A man has been convicted of killing a Syracuse University student from China during a drug deal robbery last fall. The PostStandard reports 24yearold Syracuse resident Cameron Isaac was found guilty Tuesday of firstdegree murder in the shooting of 23yearold Yuan Xiaopeng .


Most Popular Stories

Man guilty of killing Syracuse University student from China
Search for "math OR mathematics"16 Aug 2017  8:36 am 
A Few of My Favorite Spaces: A 6Holed Torus
Scientific American  Math5 Aug 2017  6:00 amIt all starts with a pentagon...  Read more on ScientificAmerican.com 
Cathleen Morawetz, Mathematician With RealWorld Impact, Dies at 94
Mathematics11 Aug 2017  11:50 amIn one case, Dr. Morawetz’s work helped aerospace engineers minimize shock waves around the wings of airplanes flying below the speed of sound. 
How to Leverage Pinterest to up Your Math Game
Blog – DreamBox Learning15 Aug 2017  5:00 amPinterest is a great place to collect inspiration for a vast array of things—from what to make for dinner tonight to how to extract a splinter using just a widemouthed bottle and some hot water. But, is the home of “swineapple” recipes and life hacks really a good place to curate instructional insights for your classroom? You bet, especially if you do your homework and mind the rabbit hole (try not to get sidetracked). According to recent survey findings published by the RAND Corporation, 86 percent of elementary teachers and 63 percent of secondary teachers say they regularly peruse… 
Ways to Perform Calculations on Groups of Data in Tables
Loren on the Art of MATLAB9 Aug 2017  6:38 amToday I'd like to introduce a guest blogger, Stephen Doe, who works for the MATLAB Documentation team here at MathWorks. Stephen will discuss different methods for grouping data, and performing calculations on those groups, using Tables.ContentsCreate TablePerform Calculation on Each Numeric VariablePerform Calculation on Groups in Numeric VariablesMultiple Variables as Input Arguments to FunctionUse Groups in Multiple Calculations and Tabulate ResultsPerform Calculations on Tall TableTurning the Tables on YouCreate TableTables are convenient containers for columnoriented data. The variables…




Search for "math OR mathematics"

Man guilty of killing Syracuse University student from China
16 Aug 2017  8:36 amA man has been convicted of killing a Syracuse University student from China during a drug deal robbery last fall. The PostStandard reports 24yearold Syracuse resident Cameron Isaac was found guilty Tuesday of firstdegree murder in the shooting of 23yearold Yuan Xiaopeng . 
Greenlight Capital Re Names Belfatti to New Role of Chief Operating Officer
16 Aug 2017  8:27 amGreenlight Capital Re, the Cayman Islandsbased specialist property and casualty reinsurance company, announced it has hired Michael Belfatti to the newly created position of chief operating officer, effective immediately. Belfatti's responsibilities as COO will include oversight of the company's pricing, actuarial and risk management functions, and spearheading data collection, analytics and technology efforts across the company. 
Microsoft's autonomous gliders seek out thermal updrafts to stay aloft
16 Aug 2017  8:23 amMicrosoft wants to build autonomous tech for aircraft that require little to no power to fly. It just completed tests in the Nevada desert of gliders equipped with selfguidance systems that help them track regions of rising hot air and predict their movement, with the aim of staying up in the air for as long as possible. 
Amber Portwood: Get All the Details on Her New Man
16 Aug 2017  8:21 amWe learned that Amber Portwood had landed herself a new boyfriend , meaning that, once and for all, that nasty, uncomfortable Matt Baier chapter in her life was officially over. Of course, that's not to say that Matt isn't waiting in the wings, sharpening his claws and preparing himself to pounce at her next vulnerable moment. 
Jacks Creek Elementary School News
16 Aug 2017  8:20 amKindergarten has rocked this week!! All of our students returned on Thursday. We are making new friends and learning all of our school rules and procedures.



Scientific American  Math

A Few of My Favorite Spaces: A 6Holed Torus
5 Aug 2017  6:00 amIt all starts with a pentagon...  Read more on ScientificAmerican.com 
How Math Puzzles Help You Plan the Perfect Party
2 Aug 2017  12:30 pmThe right mix of people who already know one another, of boys and girlsRamsey numbers may hold the answer  Read more on ScientificAmerican.com 
Mathematics World Mourns Maryam Mirzakhani, Only Woman to Win Fields Medal
17 Jul 2017  11:45 amThe brilliant Stanford professor, killed by breast cancer at 40, worked with shapes unconstrained by the real world  Read more on ScientificAmerican.com 
What Are Mixed Fractions?
8 Jul 2017  5:00 amHow do they work? And how can you turn them into improper fractions? Keep on reading to find out!  Read more on ScientificAmerican.com 
Review: Remembering Sofya Kovalevskaya
3 Jul 2017  10:00 amMichle Audin’s book about Sofya Kovalevskaya is a fascinating combination of biography, personal reflections, and fictional digressions  Read more on ScientificAmerican.com



Mathematics

Cathleen Morawetz, Mathematician With RealWorld Impact, Dies at 94
11 Aug 2017  11:50 amIn one case, Dr. Morawetz’s work helped aerospace engineers minimize shock waves around the wings of airplanes flying below the speed of sound. 
With Snowflakes and Unicorns, Marina Ratner and Maryam Mirzakhani Explored a Universe in Motion
7 Aug 2017  1:57 pmThe legacies and achievements of two great mathematicians will dazzle and intrigue scholars for decades. 
Marina Ratner, Émigré Mathematician Who Found Midlife Acclaim, Dies at 78
25 Jul 2017  6:16 pmDr. Ratner defied the notion that the brightest in her field do their best work when they are young. 
Maryam Mirzakhani, Only Woman to Win a Fields Medal, Dies at 40
16 Jul 2017  10:31 amDr. Mirzakhani, a mathematician at Stanford University, was the only woman and only Iranian ever to win what is often described as the Nobel Prize of mathematics. 
Questions for: ‘Ending the Curse of Remedial Math’
13 Jun 2017  1:45 amWhat strategies does the CUNY Start program use to serve as a model for remedial students at the college level?



Blog – DreamBox Learning

How to Leverage Pinterest to up Your Math Game
15 Aug 2017  5:00 amPinterest is a great place to collect inspiration for a vast array of things—from what to make for dinner tonight to how to extract a splinter using just a widemouthed bottle and some hot water. But, is the home of “swineapple” recipes and life hacks really a good place to curate instructional insights for your classroom? You bet, especially if you do your homework and mind the rabbit hole (try not to get sidetracked). According to recent survey findings published by the RAND Corporation, 86 percent of elementary teachers and 63 percent of secondary teachers say they regularly peruse Pinterest for ideas to augment their curriculum. In fact, for an increasing number of teachers, Pinterest has become... 
5 Practical Tips for Bringing Tech into the Classroom
10 Aug 2017  1:32 pmWe recently challenged members of DreamBox Nation to share their top tips for bringing technology into the classroom. More than a hundred of you responded with practical insights on everything from securing funding to embracing rotation models. As we sorted through your feedback, a common thread emerged. Whether it’s securing the actual physical resources (devices and apps) to introduce technology to their students or simply mustering the courage to try new things, DreamBox educators are getting it done. We’ve compiled all your passionate, resourceful, and creative responses into these five practical, shareworthy tips for our readers: <ol> <li> Eliminate the fear factor It’s amazing how many responses...</li></ol> 
Attention New and Returning DreamBox Educators and IT Personnel: Mark your calendars!
8 Aug 2017  5:00 amGetting started (and reacquainted) with DreamBox is easy—especially when you register for our orientation webinars covering everything from roster management to finding your way around the newly enhanced Insight Dashboard. Next week, August 15th through August 18th, we’ll be offering one live session a day on setting up your roster in DreamBox. These 60minute webinars are perfect for district IT administrators, and anyone else who may be involved with the technical aspects of creating and managing DreamBox rosters. DreamBox technical experts will be on hand to answer your questions and provide timesaving tips to help set you up for success. To learn more about provisioning in DreamBox, and which roster... 
Join DreamBox August 21st25th for BacktoSchool Boot Camp
3 Aug 2017  5:00 amIt’s that time. Yes, that time. Well, almost. It seems as though backtoschool (B2S) advertising starts earlier and earlier each year. There used to be an unspoken but widely observed rule that you couldn’t utter the words, “backtoschool,” until the ashes from your 4th of July cookout had cooled. Nowadays, the B2S chatter starts hours after the last student steps off school grounds in June, and it doesn’t let up until the final waning hours of August. Don’t panic. Despite what retailers would have you think, you’ve still got a few more weeks to soak up a little more summer before the new school year kicks off. Still, you want to be able to hit the ground running when the time comes—and it... 
News Flash: Everybody’s talking about technologyenhanced learning
1 Aug 2017  5:00 amIf you subscribe to international news sources like The New York Times and The Economist, or various business blogs and podcasts, you may have noticed a recent uptick in the coverage of edtech. We sure have. Those of us in the education community generally rely on our own industry publications and journals to track the latest developments in technologyenhanced learning. But, lately we’re noticing that more and more mainstream media outlets are picking up on the innovative learning models that are transforming the way we teach and learn. What’s even more exciting for us at DreamBox is the fact that publications everywhere seem to be recognizing and reporting on our unique platform, and our mission to...



Loren on the Art of MATLAB

Ways to Perform Calculations on Groups of Data in Tables
9 Aug 2017  6:38 amToday I'd like to introduce a guest blogger, Stephen Doe, who works for the MATLAB Documentation team here at MathWorks. Stephen will discuss different methods for grouping data, and performing calculations on those groups, using Tables.Contents<ul><li>Create Table</li><li>Perform Calculation on Each Numeric Variable</li><li>Perform Calculation on Groups in Numeric Variables</li><li>Multiple Variables as Input Arguments to Function</li><li>Use Groups in Multiple Calculations and Tabulate Results</li><li>Perform Calculations on Tall Table</li><li>Turning the Tables on You</li></ul>Create TableTables are convenient containers for columnoriented data. The variables in a table can have different data types, but must have the same number of rows. You can access table data by row,... 
MATLAB and the 2017 Eclipse – Part 3: Rehearsing for the Eclipse
26 Jul 2017  4:32 amToday our guest blogger, David Garrison, will continue his series on MathWorks involvement in the 2017 solar eclipse.<ul><li>Part 1: The Citizen CATE Experiment</li><li>Part 2: Training the Volunteers</li><li>Part 3: Rehearsing for the Eclipse</li><li>Part 4: Imaging the Eclipse</li></ul>Here is Part 3 of the Series.Contents<ul><li>Recap of Parts 1 & 2</li><li>Rehearsing for the Eclipse</li><li>The MATLAB Solar Eclipse App</li><li>What Will Happen During Totality</li><li>After Totality</li><li>Any Questions?</li><li>Next Up: Imaging the Eclipse</li></ul>Recap of Parts 1 & 2In Part 1 of this series, I discussed MathWorks participation in the Citizen CATE Experiment  a citizen science project to image the 2017 solar eclipse. In Part 2 of this series, I described the volunteers, the equipment they will be using, and how... 
Web Scraping and Mining Unstructured Data with MATLAB
10 Jul 2017  8:39 amA lot of information is shared on the web and a lot of people are interested in taking advantage of it. It can be used to enrich the existing data, for example. However, information is buries in HTML tags and it is not easy to extract useful information. Today's guest blogger, Toshi Takeuchi shows us how he uses MATLAB for web scraping to harvest useful data from the web and then uses fuzzy string match to enrich existing data. Contents<ul><li>NIPS 2015 Papers</li><li>Scraping Data from a Web Page</li><li>Matching Scraped Data to Database Table</li><li>Fuzzy String Matching</li><li>Validating Fuzzy Match Results</li><li>Updating Missing Values with Fuzzy Match Result</li><li>Reviewing Unmatched</li><li>Substring Match</li><li>Updating Missing Values with Substring Match...</li></ul> 
MATLAB and the 2017 Eclipse – Part 2: Training the Volunteers
27 Jun 2017  7:34 amToday our guest blogger, David Garrison, will continue his series on MathWorks involvement in the 2017 solar eclipse.<ul><li>Part 1: The Citizen CATE Experiment</li><li>Part 2: Training the Volunteers</li><li>Part 3: Rehearsing for the Eclipse</li><li>Part 4: Imaging the Eclipse Here is Part 1 of the Series.</li></ul>Here is Part 2 of the Series.Contents<ul><li>Recap of Part 1</li><li>The Project Volunteers</li><li>The Equipment</li><li>Training the Volunteers</li><li>Any Questions?</li><li>Next Up: Practicing for the Eclipse</li></ul>Recap of Part 1In Part 1 of this series I discussed the total solar eclipse that will occur on August 21, 2017 where the path of totality will pass over the continental United States. The National Solar Observatory is running a citizen science project called the Citizen CATE... 
Customer Blog, a Great Resource, Especially for Earth Sciences
12 Jun 2017  5:21 amCustomer Blog, a Great Resource, Especially for Earth SciencesI recently started following a new blog by Martin Trauth, called MATLAB Recipes for Earth Sciences. Even if you are not an earth scientist (which, by the way, is part of my scientific lineage), you may find many useful nuggets there.Martin is a geoscience professor at University of Potsdam. He's written wellregarded textbooks, one with the same title as his blog (which he currently posts to at a very healthy pace, one I cannot sustain!). Martin's post cover a huge range of topics, many of which are not at all specific to, though helpful to, geoscientists. Some notable titles I read recently include:<ul><li>Missing Version History of MATLAB...</li></ul>



Homeschool Math Blog

How to talk math with your kids  video
31 Jul 2017  5:16 amKent Haines is both a math teacher and a dad. In this video, he shares some excellent tips on how to help your children's "mathreadiness", expressing it with a modern term. Or we might just say, how to help your children understand their world with math. It's aimed at parents of little children but the ideas ring true for other ages too:The three important guidelines he shares are:1. Use math language.2. Play.3. Focus on questions, not on answers.I enjoyed the video! 
Word problems involving "four times as many as"
21 Jul 2017  12:34 pmSomeone asked for help to explain the concepts of multiplicative word problems involving "as many as", like the ones below:1) Haley had four times as many dollars as her sister. Together they had $60. How much money does Haley have?2) Rachel had 5 times as many dollars as her sister, Nora. They had a total of $90. How much money did each of them have?The BAR MODEL is an excellent tool for helping children understand what is going on in these types of word problems.In (1), draw a bar for Haley and another for her sister. Divide Haley's bar into four parts, and make the other bar just one such part long.Haley Sister Now you will see that the TOTAL needs divided into FIVE equal parts —... 
Flash sale for Math Mammoth
13 Jul 2017  6:26 amHomeschool Buyers Coop is running a FLASH SALE for the large Math Mammoth bundles — get them at 40% off! This sale ends on July 17, 2017. 
Graph paper, and those who don't love math
3 Jul 2017  8:35 pmIf you have a few minutes, check outhttp://tjzager.com/2017/06/17/representationsandmanipulativesandtoolsandthings/It's an interesting and encouraging read. Thoughts about technology (no need for it at every turn), and how to teach those who don't love math, and how just a piece of graph paper can lend itself to a powerful learning tool...! 
What age do YOU think is old?
30 Jun 2017  6:33 amI just saw this in the IntMath Newsletter I subscribe to...QUOTEHere's an age equation that's pretty accurate:OldAge = 10 * √NowAgeWhen you're 16, old people are 40. When you're 50, old people are 70, and when you're 100, you know you're old!UNQUOTEHat Tip to Murray fromhttp://www.intmath.com/blog/letters/intmathnewsletterquadraticgraphscymathfoodlearning11234



Denise Gaskins' Let's Play Math

Calling All Math Teacher Bloggers and Homeschoolers: Carnival Time!
14 Aug 2017  6:25 amby Bob Jagendorf via flickr The monthly Math Teachers at Play (MTaP) math education blog carnival is almost here. If you’ve written a blog post about math, we’d love to have you join us! Each of us can help others learn, so in a sense we are all teachers. Posts must be relevant to students or teachers of schoollevel mathematics (that is, anything from preschool up to firstyear calculus). Old posts are welcome, as long as they haven’t been published in recent editions of this carnival. Click here to submit your blog post Have you noticed a new math blogger on your block that you’d like to introduce to the rest of us? Feel free to submit another blogger’s post in addition to your own. Beginning bloggers... 
Mindset for Learning Math
31 Jul 2017  5:25 amPlaying with a new image editor, I came across this Winston Churchill quote. What a great description of how it feels to learn math! If you have a student who struggles with math or is suffering from a loss of enthusiasm, check out Jo Boaler’s free online course on developing a mathematical mindset: <ul> <li>How to Learn Math</li> </ul> Or explore some of the playful activity ideas for all ages in her Week of Inspirational Math. Want to help your kids learn math? Claim your free 24page problemsolving booklet, and sign up to hear about new books, revisions, and sales or other promotions. 
Math Teachers at Play #110 via Three J’s Learning
28 Jul 2017  5:40 amCheck out the new playful math blog carnival at Three J’s Learning blog. Joshua has put together a great collection of math games, activities, and teaching tips: <ul> <li>Math Teachers At Play Carnival #110 Summer Vacation Edition</li> </ul> The carnival features shape puzzles, absolute value, prime numbers, pigs in pens, fair sharing, talking with kids, thoughtful essays, and even explosions. Along with a tribute to Maryam Mirzakhani, with mathematical ideas to explore in her honor. Click here to go read the carnival blog And if you’re a blogger, be sure to submit your blog post for next month’s carnival! Past carnivals are still full of mathy treasure. Check them out: <ul> <li>Browse all the past editions of the Math Teachers at...</li></ul> 
How to Talk Math With Your Kids
18 Jul 2017  5:47 amA friend shared this video, and I loved it! From Kent Haines, a father who happens to also be a math teacher… “I hope that this video helps parents find new ways of interacting with their kids on math topics.” —Kent Haines More from Kent Haines <ul> <li>My First Math Event: Planning a mathplay party at the local library.</li> <li>What the Kids Made at My First Math Event: Symmetry art and fun with mirrors.</li> <li>Talking to Parents about Math Explorations: Plus a link where you can buy your own mirror book.</li> <li>Ana: An inspirational story about one student who struggled with math — and who still finds math hard, but worth the effort.</li> </ul> Advice and Examples of Talking Math with Kids If you enjoyed Kent’s video, you’ll love... 
Math Teachers and Homeschool Bloggers: We Want You!
17 Jul 2017  9:10 am[Photo by Olga Berrios via flickr.] Do you have a favorite blog post about math activities, games, lessons, or handson fun? The Math Teachers at Play (MTaP) math education blog carnival would love to feature your article! We welcome math topics from preschool through the first year of calculus. Old posts are welcome, as long as they haven’t been published in recent editions of this carnival. Click here to submit your blog post Don’t procrastinate: The deadline for entries is Friday, July 21. The carnival will be posted next week at Three J’s Learning blog. Would You Like to Host the Carnival? Hosting the blog carnival is fun because you get to “meet” new bloggers through their submissions. And there’s a...



Basic mathematics blog

Bessy and Bob algebra word problem
28 Jul 2017  11:38 amBessy has 6 times as much money as Bob, but when each earn $6. Bessy will have 3 times as much money as Bob. How much does each have before and after 
Population growth
28 Jul 2017  11:32 amThe population of a town with an initial population of 60,000 grows at a rate of 2.5% per year. What is population in 5 years? In 10 years? How many years 
Comparison Word Problems
25 Jul 2017  6:06 pmLearn to solve comparison word problems using modeling 
Find water left in a tank using arithmetic sequences
20 Jul 2017  7:41 pmA water tank is emptied at a constant rate. Initially, 36,000 gallons of water were in the tank. A the end of five hours, 16,000 gallons remained. How 
distance from the mountain
15 Jul 2017  7:45 pmJane drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 10 hours. When Jane drove home, there was no traffic



Computational Complexity

What is unusual about this MIT grad student in Applied Math?
13 Aug 2017  6:45 pm(Thanks to Rachel Folowoshele for bringing this to my attention) John Urschel is a grad student in applied math at MIT. His webpage ishere. Some students go straight from ugrad to grad (I did that.) Others take a job of some sort and then after a few years go to grad school. That's what John did; however, his prior job was unusual among applied math grad students He was in the NFL as a professional football player! Seeherefor more about the career change, though I'll say that the brainproblems that NFL players have (being hit on the head is not a good for your brain) was a major factor for doing this NOW rather than LATER. How unusual is this? Looking around the web I found lists of smart... 
Wearable Tech and Attention
10 Aug 2017  4:09 amRemember the Bluetooth craze where it seemed half of all people walked around with a headset in their ear. Now you rarely do. Remember Google Glass. That didn't last long. I remember having a conversation with someone and all of sudden they would say something nonsensical and you'd realize they are on the phone talking to someone else. Just by wearing a Bluetooth headset you felt that they cared more about a potential caller than the conversation they were currently having with you. Google glass gave an even worse impression. Were they listening to you or checking their Twitter feed? [Aside: I now use "they" as a singular genderless pronoun without even thinking about it. I guess an old dog can learn new... 
Should we care if a job candidate does not know the social and ethical implications of their work (Second Blog Post inspired by Rogaway's Moral Character Paper)
6 Aug 2017  6:49 pmPhillip Rogaway's article on the The Moral character of Cryptographic Work (seehere) brings up so many issues that it could be the topics for at least 5 blog posts. I've already done one here, and today I'll do another. As I said in the first post I urge you to read it even if you disagree with it, in fact, especially if you disagree with it. (Possible Paradox you have to read it to determine if you disagree with it.) Today's issue: Should a department take into account if someone understand the social and ethical issues with their work? 1) I'll start with something less controversial. I've sometimes asked a job candidate `why do you work on X?' Bad answers: Because my adviser told me... 
What Makes a Great Definition
3 Aug 2017  5:15 amToo often we see bad definitions, a convoluted mess carefully crafted to make a theorem true. A student asked me though what makes for a great definition in theoretical computer science. The right definition can start a research area, where a bad definition can take research down the wrong path. Some goals of a definition: <ul> <li>A great definition should capture some phenomenon, like computation (Turing machines), efficient computation (P), efficient quantum computation (BQP). Cryptography has produced some of the best (and worst) definitions to capture security concerns.</li> <li>A great definition should be simple. Defining computability by a Turing machinegood. Definition computability by by the 1334 pageISO/IEC...</li></ul> 
Harvard punishes some social organizations. Why?
31 Jul 2017  5:02 amOver at the blog Bits and Pieces my adviser Harry Lewis (is he still my adviser 32 years after I got my PhD? Yes) has written many posts about Harvard's decision to ban people who belong to samesex organizations from being approved for Rhodes Fellowships and other things. He is against it. Not just that, he gives history, context, etc. While originally intended to stop some excesses of some male clubs, the ban also punishes allfemale clubs. But that's not the only reason the punishment is idiotic.. I could not possibly describe and argue against the policy as well as Harry Lewis can, (e.g., he never used the word idiotic) so I was going to write a post briefly describing the situation and then pointing...



Natural Blogarithms

How to Print to PDF on your iPhone or iPad
25 Jul 2017  2:40 pmThis howto is based on iOS 10 and I only just discovered this feature, in spite of having looked for it many times over. Whether from a website or from a word processing app or just about anywhere, I’ve always wanted to be able to print to PDF on my iOS devices. It seemed only natural that Apple would make something like this available when you print from your device. When you go to the share icon and choose to print, shouldn’t one of your options be to select a PDF printer? But, alas, you can only select an AirPrint enabled printer on your network. Well, I have GOOD NEWS! The capability is there and has been there all along. Here’s what you do: <ol> <li>Go to any app that is printenabled and select to print....</li></ol> 
Is it a core requirement or just an elective?
11 Nov 2016  6:00 amThis week of Creation Care emphasis has coincided with a very busy time of the semester on the Plainview campus. We are in the first week of early registration for the Spring term which means faculty and students alike are pouring over course schedules and degree plans. As a result, my mind has unavoidably conflated the two. As I listened to Rachel Lamb’s message in chapel on Wednesday, I was challenged in a new way regarding the role of Creation Care in my daily walk with Christ. It was several years ago when we first began our Creation Care emphasis week at Wayland that I first made the connection between caring for the environment and my duty as a Christian to be a steward of God’s creation. ... 
Why I do what I do
24 Jun 2016  4:30 amAs I glance back over the previous post where I listed out those questions I intend to tackle here, openly on my blog, I noticed a somewhat glaring omission. There are no “Why?” questions, not even the most important one: Why do I do what I do? My life has taking only a small number of twists and turns. In fact, it almost seems as though I have been on track for this current career path ever since I decided to add a mathematics major my second year of college. For those that do not know, I first shopped for colleges based on my intent to enter fulltime vocational ministry. I found Wayland to be that place where there was the greatest personal attention and interest in my own personal success. Some... 
Summer Blog Project
23 May 2016  7:44 amI’m about to ramble so take this as fair warning. My blog has been around for a long time and has meandered through many identity crises. Sometimes, it’s a puzzle blog posting interesting mindbenders that need a keen intellect and occasionally, some mathematics. That’s all still here, by the way, which you can find with a notsodifficult search tool in the sidebar. It’s also been a devotional through my efforts to better understand our responsibilities as stewards of God’s creation. It’s been a log of classroom activities. At one time, I was posting periodically about what I had accomplished in each of my classes. For the last few years, it has been only a repository for sparse events and... 
Grand Canyon – A photographic tour
17 Mar 2016  11:13 pmThese are a collection of my favorite shots from our recent road trip to New Mexico and Arizona. Click to view slideshow.



The Math Less Traveled

From primitive roots to Euclid’s orchard
26 Jul 2017  9:34 amCommenter Snowball pointed out the similarity between Euclid’s Orchard… …and this picture of primitive roots I made a year ago: At first I didn’t see the connection, but Snowball was absolutely right. Once I understood it, I made this little animation to illustrate the connection more clearly: (Some of the colors flicker a bit; I’m not sure why.) 
A few words about PWW #20
22 Jul 2017  2:08 pmA couple commenters quickly figured out what my previous post without words was about. The dots making up the image are at integer grid points , with the center at . There is a dot at if and only if and are relatively prime, that is, . Here is a slightly smaller version so it’s easier to see what is going on: I learned from Lucas A. Brown that this is sometimes known as “Euclid’s Orchard”. Imagine that there is a tall, straight tree growing from each grid point other than the origin. If you stand at the origin, then the trees you can see are exactly those at grid points with . This is because if a tree is at for some , then it is blocked from your sight by the tree at : both lie exactly... 
Post without words #20
8 Jul 2017  7:37 pm 
The curious powers of 1 + sqrt 2: recurrences
6 Jul 2017  10:51 amIn my previous post, we found an answer to the question: What’s the 99th digit to the right of the decimal point in the decimal expansion of ? However, the solution depended on having the clever idea to add . But there are other ways to come to similar conclusions, and in fact this is not the way I originally solved it. The first thing I did when attacking the problem was to work out some small powers of by hand: and so on. It quickly becomes clear (if you have not already seen this kind of thing before) that will always be of the form . Let’s define and to be the coefficients of the th power of , that is, . Now the natural question is to wonder what, if anything, can we say about the... 
The curious powers of 1 + sqrt 2: a clever solution
21 Jun 2017  12:28 pmRecall that we are trying to answer the question: What’s the 99th digit to the right of the decimal point in the decimal expansion of ? In my previous post, we computed for some small and conjectured that the answer is , since these powers seem to be alternately just under and just over an integer. Today, I’ll explain a clever solution, which I learned from Colin Wright (several commenters also posted similar approaches). First, let’s think about expanding using the Binomial Theorem: We get a sum of powers of with various coefficients. Notice that when is raised to an even power, we get an integer: , , and so on. The odd powers give us irrational things. So if we could find some way to...



WordPress Tag: Mathematics

Book Announcement: Understanding Interactions in Complex Systems: Toward a Science of Interaction
16 Aug 2017  8:00 amUnderstanding Interactions in Complex Systems: Toward a Science of Interaction now available from Cambridge Scholars Publishing Hardback, pp405, £87.99 / $149.95 Cambridge Scholars Publishing is pleased to announce the publication of Understanding Interactions in Complex Systems: Toward a Science of Interaction, edited by Nicolas Debarsy, Stéphane Cordier, Cem Ertur, François Nemo, Déborah NourritLucas, Gérard Poisson and Christel Vrain. Since human activities are embedded in interactions, they are at the very center of the modeling of any form of social life, shaping societies, groups and interpersonal relationships. All theories of social, cognitive and cultural life are thus associated with... 
Daily Questions  16/08/2017
16 Aug 2017  7:05 am 
Flash Blog: GRASCan, Book, AIMS
16 Aug 2017  4:42 amI’ve returned home this week to my own mountain of work, after a conference and short vacation 
Curious Number Patterns #3
16 Aug 2017  2:00 amPalindrome and Prime 93639 (a palindromic number) plus the sum of its prime factors is equal to 9368 
Maths HW 16817
16 Aug 2017  1:44 amDear Learner Complete Ex6.3 in NB2. Regards MT



Maths Tips From Maths InsiderMaths Tips From Maths Insider

5 Best Maths Exam Revision Tips for PanicFree Exams
2 Aug 2017  12:54 amI’ve invited Mark Maclaine, a London based super tutor specialising in maths, science and school admissions, to share his best maths exam revision tips for panicfree exams. To really get to grips with your maths exam revision, you’ll need to use techniques that actively help you engage with the topics. Reading through notes and copying out questions will only get you so far, so for the times when you want to try changing up your revision plan, these are my 5 best maths exam revision tips. 1. Practise past papers Working through past papers is the best way to get an understanding of the exam format and different types of questions that will come up. Remember that it’s vital you practise past papers... 
10 Awesome Lego Math Videos for Creative Kids
28 Jan 2017  5:36 amWho doesn’t love lego bricks? This simple toy appeals to kids of all ages and even holds the title of being the “world’s most powerful brand.” Certainly in my household, my kids love to build with lego bricks and I love the fact that they are using math without realising it. For a more formal approach to using Lego bricks to teach math, check out these 10 awesome lego math videos for creative kids (and their parents!) 1. Lego Color Sorting Activity For Preschool Math and Fine Motor Development Put your preschooler to work sorting their lego by color or size. Muffin tins or used egg cartons make excellent temporary containers for this activity. You could also buy sectioned containers so that the newly... 
11 Hot Math Education Research Studies to Boost Your Child’s Math Skills
15 Nov 2016  2:06 amHave you ever wondered what makes some people into natural mathematicians while others seem to struggle with grasping even basic concepts? Do you wonder whether there are things you should be doing to help your children reach their potential in math? Here’s my rundown of recent math education research into how we learn, and how best to develop your child’s math skills. 1 Babies’ spatial reasoning predicts later math skills. Stella Lourenco, a psychologist from Emory University conducted a study showing that babies with a stronger interest in a video stream of mirrored images went on to have greater mathematical skill at age four than those with less interest. This may be why some people seem to... 
Have You Seen These 15 Awesome Math Toys and Games?
31 Oct 2016  2:48 amAre you keen to help your children cement the math skills they’re learning, but finding them less than willing to spend their free time practising times tables or number bonds? Hopefully, you’ve had a chance to look around here at Maths Insider to see some of my suggestions for ways to make math practice more fun. Here’s a list of math toys and games with a definite emphasis on fun and a whole lot of math learning thrown in for good measure. Number skills builders for preschoolers 1 Smart Snacks Number Pops – a fun way to encourage number recognition and fine motor skills at the same time. Match the numbers to the dots and slide the coloured shell over the corresponding lolly. Contains 10... 
Sumaze Math App – Perfect for all Ages
1 Oct 2016  7:15 amSumaze! is a cool problemsolving app that helps kids and adults build an intuitive approach to math. I’ve been playing it for for past week and it really is kind of addictive! What I also love about it is that it’s low stakes – no timers and no negative audio sounds when you get the puzzle wrong, so it’s perfect for nervous young mathematicians! Sumaze’s puzzles involve arithmetic, inequalities, the modulus function, indices, logarithms and primes and players don’t need ANY previous knowledge of these topics in order to play. This app was created by the UK organization Mathematics in Education and Industry (MEI) and the Sigma network who provide support for excellence in mathematics and...



Math ∞ Blog

James Grime: FOOL FOR MATHS*
8 Aug 2017  11:41 amJames Grime is a mathematician with a personal passion for maths communication and the promotion of mathematics in schools and to the general public. He can be mostly found doing exactly that, either touring the world giving public talks or on YouTube. James has a Ph.D. in mathematics and his academic interests include group theory (the mathematics of symmetry) and combinatorics (the mathematics of networks and solving problems with diagrams and pictures). James also has a keen interest in cryptography (the mathematics of codes and secret messages), probability (games, gambling and predicting the future) and number theory (the properties of numbers). James went on to study mathematics at Lancaster... 
Subtraction: What is “the” Standard Algorithm?
31 Jul 2017  5:57 pmSubtraction: What is “the” Standard Algorithm? One common complaint amongst antireform pundits is that progressive reform math advocates and the programs they create and/or teach from “hate” standard arithmetic algorithms and fail to teach them. While I have not found this to be the case in actual classrooms with real teachers where series such as EVERYDAY MATHEMATICS, INVESTIGATIONS IN NUMBER DATA & SPACE, or MATH TRAILBLAZERS were being used (in fact, the socalled “standard” algorithms are ALWAYS taught and frequently given pride of place by teachers regardless of the program employed), the claim begs the question of how and why a given algorithm became “standard” as well as how being “standard”... 
Alan Schoenfeld: At the Boundaries of Effective Mathematics Thinking, Teaching, and Learning
22 Jul 2017  10:06 pmAn Interview with Alan Schoenfeld: At the Boundaries of Effective Mathematics Thinking, Teaching, and Learning Alan Schoenfeld is the Elizabeth and Edward Conner Professor of Education and Affiliated Professor of Mathematics at the University of California at Berkeley. He has served as President of AERA and vice President of the National Academy of Education. He holds the International Commission on Mathematics Instruction’s Klein Medal, the highest international distinction in mathematics education; AERA’s Distinguished Contributions to Research in Education award, AERA’s highest honor; and the Mathematical Association of America’s Mary P. Dolciani award, given to a pure or applied mathematician... 
Dr. Devlin Finds Fibonacci
31 May 2017  8:47 pmWhat would make you write a book about writing a book you recently published on a 13thcentury mathematician? When you’re Stanford University’s Keith Devlin (aka, NPR’s “The Math Guy”) and the mathematician is Leonardo of Pisa (aka, “Fibonacci”), the story of researching the first book, The Man of Numbers, becomes an incredible story in itself: Finding Fibonacci: The Quest to Rediscover the Forgotten Mathematical Genius Who Changed the World. What makes Devlin’s story so compelling is that it involves many other people, multiple countries, 900+ years, and enough setbacks, twists and turns, courage, and fortitude to rival fictional adventure. Throw in the idea that Leonardo’s work helped revolutionize... 
Models and Delving Deeper Into Division
30 May 2017  8:39 pmModels and Delving Deeper Into Division Last month, we unpacked the longdivision procedure taught in American K6 classrooms, tied it into the standard “long multiplication” algorithm, discussed issues with the loss of information traded for an increase in speed and efficiency, and also explore some alternative methods for doing long division. What was taken for granted was that we knew what division “is” (I use scare quotation marks here advisedly: it’s dangerous to try to be too restrictive about the underlying meaning of “simple, elementary” mathematical operations, and I do so here without wishing to suggest that what I am offering is or could possibly be definitive). My sense is...



MathFour

Verizon Hum Commercial Promotes Being Bad at Math
12 Aug 2017  1:55 amCorporate America is at it again. Do they really fail to see that Hum by Verizon uses a lot of math, and CRAPTONS of statistics?! I was enjoying some middleofthenight software development and watching IDGo, when a horribly offensive commercial came on. I’ve edited it for brevity… Share your thoughts in the comments, and Share your thoughts in the comments below, and if you’re horrified too, share this on Twitter and Facebook! You might also be horrified by these commercials: <ul> <li>AT&T ‘In My Day’ Commercial is Killing Math Students</li> <li>What Are Your Thoughts on This Fearful Parents Video?</li> </ul> The post Verizon Hum Commercial Promotes Being Bad at Math appeared first on MathFour. 
Infinity, Earworms and the Song That Never Ends
4 May 2017  7:18 amI recently had cause to experience The Song That Never Ends. Again. Of course it “got stuck in my head,” as many songs do. Which made me think of infinity, finiteness and one of the weirdest concepts: earworms. Earworms It’s not a medical problem, although it sounds like a mix between ear mites and pinworms – yuck! Turns out earworms are those bits of a song that get in your ear and cause the whole thing to get stuck in your head. The cure to an earworm is to play the song in its entirety. It’s a psychological thing. It’s been studied. Yup – if you listen to the whole song, it goes away (you’re welcome). But what if the song never ends? “This is the song that never ends…” By the very definition of the... 
Playing the Game in Job Interviews and Math Class
19 Apr 2017  4:36 amI’ve been in education for over 20 years. I’ve learned to play the “get the job” game and gotten pretty good at it. If you’re a teacher or professor, you know the game I’m talking about: there’s the “demo teach” element of the interview process. You have a handful of other math teachers “learning” how to solve a system of equations (or some other math topic replete with pitfalls for the inexperienced) based on your minilecture for them. At some point, you stop getting annoyed at the demo teach and start thinking how it can show other math teachers a different way of teaching. Changing the Game As I mentioned previously, I’m making a transition from math teaching to math using. I’m going to be a software... 
Coding Instead of Math? Yes!
19 Mar 2017  5:34 amI’ve told so many homeschool parents to stop teaching math and instead teach coding (or programming as we used to call it). If children learn coding, then math will come as needed. The logic is the same and coding is far more exciting in today’s social setting than is math. (Yes, that’s unfortunate, but it’s true. To deny it is foolish.) So I’m taking my own advice! I’ve enrolled in The Houston Coding Bootcamp Powered by UT Austin and am tickled pink at my decision. I have a bazillion projects in my mind dying to get out (including a fully robust version of the That’s Math text messaging service). I’ve been itching to share the news on MathFour.com, but have been hesitant to do so. “I’m all math all the... 
What Kind of Math Book are You?
14 Feb 2017  8:42 amYou’ve seen the quizzes for just about every “what kind of…” Now there’s a quiz tailored to the math educators. Enjoy! A big thanks to TryInteract.com for sharing a complementary super version of their quiz maker. The post What Kind of Math Book are You? appeared first on MathFour.



Math for all Grade blog

Aug 9, mathforallgrades
9 Aug 2017  12:03 ammath for all grades covers in depth all math subjects :algebra, arithmetic, calculus with essential concepts and unlimited solved problems. 
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7 Aug 2017  2:23 amThe Mathforallgrades Blog keeps you uptodate with all additions and changes to the Mathforallgrades.com Web site. Subscribe here 
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Aug 7, 9thgrademath
6 Aug 2017  11:21 pmmath for all grades covers in depth all math subjects :algebra, arithmetic, calculus with essential concepts and unlimited solved problems. 
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MIND Research Institute Blog

Math is Universal: Interview with Education Leaders James Tanton and Nigel Nisbet
8 Aug 2017  9:00 amRecently, James Tanton, founder of the Global Math Project, and Nigel Nisbet, Vice President of Content Creation at MIND Research Institute, met to converse about their current projects and the state of math education. These educatorsturnedsocialimpactleaders share challenges and insights from decades of experience in and out of the math classroom. Here are some excerpts from their conversation. “Mathematics is often primarily seen as a tool, a practical tool for solving practical problems, devoid of a human context and a human story,” James Tanton begins, starting to dig into the challenges of teaching mathematics. “It’s often seen as austere and sterile at its heart,” Tanton continues.... 
Visual Learning Transforms ELL Math Education
2 Aug 2017  9:00 amAll students, regardless of language proficiency level, have the ability to think deeply about mathematical concepts. However, when math is presented only as words and numbers on a page, English language learners (ELL) can miss out on crucial opportunities to understand the meaning behind the math. The ST Math gamebased learning program guides students at all language proficiency levels in visualizing math concepts through tantalizingly tricky puzzle challenges. How it Works Designed by experts in neuroscience, the ST Math brainbuilding games provide all students the opportunity to become confident and capable problem solvers and to reach higher levels of math achievement. 1. ST Math Visually... 
How Do Physical Math Manipulatives Compare to Their Digital Counterparts?
26 Jul 2017  9:25 amMath manipulativesare objects that allow learners tointeract with mathematical concepts. These include everything from cusinaire rods, legos, blocks, magnets...anything that gets students touching, moving, and experiencing math concepts. The drawbacks of using these physical math manipulatives in the classroom? <ul> <li>The teacher needs to be available to give informative feedback.</li> <li>It can take a long time to set up and solve a problem with large numbers or exponential concepts.</li> <li>If students get used to thinking about fractions as a pizza slice, they may have difficulty transfering that knowledge to other representations.</li> </ul> That's not to say that they shouldn't be used. Research suggests that learning... 
Tapping Toward a Better Understanding of Slope
18 Jul 2017  9:00 amThoughts of a traditional math classroom may bring to mind images of students sitting silently at desks while a teacher works through a math problem on the board. There could be more to this scene though. Perhaps one student is using her fingers to keep track of numbers while another quietly taps his pencil along to key points of the equation. These are both small examples of embodied cognition, the idea that features of thought are shaped by aspects of the body other than the brain. Counting with fingers and tapping along to certain points on a number line can help with basic mathematical concepts, but what happens when it comes to understanding something a bit more complex? For instance, it can be... 
Making Math Second Nature
11 Jul 2017  9:00 amSome of our knowledge of the world is so well ingrained in us, that we don’t even have to think about it. Consider a chair, for example. When we see a chair, we know immediately what it is and how to sit on it. We even know different ways to sit depending on if it’s a stool or an easy chair or a beanbag. And this is all automatic, without thinking about it. Our brain has rich networks of information, called schemas, about chairs (and many other things). These schemas are created in the brain when we learn through theperceptionaction cycle. That’s what neuroscientists call the process in the brain where humans observe something in the world around them, decide to take action on their environment,...
