• Number trick with 1089

    Updated: 2010-08-31 11:57:19
    There is an amazing number trick with 1089! Learn the trick here

  • Lastest “mathematics Fractions” News

    Updated: 2010-08-31 11:09:19
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  • Rotations: from one Euler angle sequence to another

    Updated: 2010-08-31 02:01:24
    Let’s suppose we are given an Euler angle sequence ZYX with angles as = {0.2, 0.25, 0.3} We have been asked to convert that to ZYZ. (You probably want to have read the previous quaternion posts.) I will remind us that the notation ZYX means the rotation Rx Ry Rz, with the Z-axis rotation first; [...]

  • Fields Medal: Inspiring Mathematicians around the World

    Updated: 2010-08-30 18:11:15
    When a student does great on a math test, she gets a gold star from her teacher. When a math student discovers an outstanding mathematical achievement that changes the way we solve problems, she receives the Fields Medal from the International Mathematics Union. On August 19, 2010, the IMU awarded the ultimate gold star in math [...]

  • Lastest “kids Math Books” News

    Updated: 2010-08-29 19:20:06
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  • New Math Activity Calendar: September is Self Improvement Month

    Updated: 2010-08-26 17:17:08
    Though the sun is still shining, the start of the school year has begun. Balance the start of homework with fun and educational activities from DreamBox! September is Self Improvement month, and students can work on improving their math skills, and themselves, with our new September Math Activity Calendar. Activity Calendar Highlights: Skyscraper Day! Figure out what [...]

  • Lastest “kids Math Books” News

    Updated: 2010-08-26 10:21:36
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  • How Can I Possibly Differentiate In Math?

    Updated: 2010-08-25 17:11:13
    Anyone involved in education these days has surely heard the term Differentiated Instruction. Used in many ways, differentiated instruction is a proactive teaching method that centers around each student as a unique learner. Simply put, every child arriving in my classroom shows up with differing skills and interests. It is paramount to use varying strategies and [...]

  • Apollonius geometry iphone app: free to first 5 commenters

    Updated: 2010-08-24 17:43:00
    : Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Apollonius geometry iphone app : free to first 5 commenters August 24th , 2010 by Sol Update : All 5 free apps are gone but you can buy one for 3.99 at Itunes . Adolfo Rodriguez has created an iPhone iPod Touch iPad interactive geometry app called Apollonius . It can be described as a simplified touchscreen version of Cabri” or The Geometer’s Sketchpad . 8221 Adolfo is giving away five copies of the . app http : www.youtube.com watch v=cT-Duqz5vNE Apollonius is the first and so far the only Interactive Geometry Software IGS for the iPhone and iPod Touch . It allows you to make geometric constructions such as those made using a compass and straightedge ruler and move their parts smoothly

  • The Weights Puzzle

    Updated: 2010-08-24 17:35:08
    From the 1966 Moscow Math Olympiad: Prove that you can choose six weights from a set of weights weighing 1, 2, …, 26 grams such that any two subsets of the six have different total weights. Prove that you can’t choose seven weights with this property. Let us define the sequence a(n) to be the [...]

  • Rotations, especially Euler angle sequences

    Updated: 2010-08-24 02:44:24
    In this post, I simply want to play with the Euler angle representations of some rotations. This is not a thorough test suite, merely a handful of different cases: for a random rotation… ZYX ZXZ ZXZ for… x-axis rotation y-axis rotation z-axis rotation ZYX for… x-axis rotation y-axis rotation z-axis rotation A random orthogonal matrix [...]

  • Dirt Sells

    Updated: 2010-08-21 19:01:36
    Two month ago I made a minor rearrangement of my math humor page. The traffic to that page tripled. Would you like to know what I did? I collected all the suggestive jokes in one chapter and named it Dirty Math Jokes. Mathematics is so far from sex that stumbling on a math sex joke [...]

  • Happenings – 2010 Aug 21

    Updated: 2010-08-21 18:48:09
    I expect to be drafting another post on quaternions today… mostly examples. But what I’ve been putting time into when I could during the week, is linear programming. Speaking for myself, I would say: forget about the specific linear programming functions in Mathematica®. Instead, just use Minimize or NMinimize (resp. Maximize or NMaximize). No matter [...]

  • 2nd blog post at Equalis

    Updated: 2010-08-20 22:56:55
    Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos 2nd blog post at Equalis August 20th , 2010 by Sol Here is the second blog article in which I stumble around the Math blogosphere blathosphere and note interesting things I . find In that article I share links to a few interesting exploration posts my favorite kind and I give more information about the clever clock conundrum that no one responded . to Check it out If you enjoyed this post , make sure you subscribe to my RSS feed Post a Comment Name E-mail will not be published Website Notify me of followup comments via e-mail Click Here For RSS Feed Recent Posts Apollonius geometry iphone app : free to first 5 commenters 2nd blog post at Equalis Wild about Math bloggers Couple of carnivals

  • Keeping Kids Engaged and in School

    Updated: 2010-08-20 17:33:02
    Gonzaga University recently conducted a study that focused on dropout prevention in middle school. The study suggests this early intervention provides “an early warning system for identifying potential dropouts, a bigger variety of academic opportunities and more rigor and additional funding for community-based social support programs”. (Read the full report, “Enhancing Middle School Student Experiences”). We [...]

  • PRESS RELEASE: Boston Mathematician Re-Inventing Textbooks with Modern Students in Mind

    Updated: 2010-08-19 01:39:18
    Boston Mathematician Re-Inventing Textbooks with Modern Students in Mind By Kyle Psaty | August 18th, 2010 After 24 years of teaching math at the collegiate level, Northeastern University professor Dr. David Massey decided to change the way mathematics textbooks were created and distributed. What he saw was a space filled with overpriced books and difficult-to-understand [...]

  • Get weekly emails about new Mathematics books

    Updated: 2010-08-17 21:51:46
    Today I’m announcing a pet project of mine that I think may interest some of my readers. Any new books? is a free notification service which enables you to subscribe to a series of subjects that interest you and receive weekly emails about new book releases in those categories. These books are hand-selected, to filter [...]

  • More Favorite Stories That Teach Math

    Updated: 2010-08-17 18:08:32
    With a new crop of 4 year olds in our extended family, I’m always picking up on the changing book choices when it comes to story time at our house. I’ve blogged about math in children’s literature before – there’s no end of possibilities – because I love that reading to kids can also be [...]

  • Wild about Math bloggers

    Updated: 2010-08-15 18:07:35
    Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Wild about Math bloggers August 15th , 2010 by Sol Check out my first blog article at Equalis Today begins my voyage into the Math blogosphere , which I believe Vlorbik first named the blathosphere . My aim with this weekly series is to highlight the Math-related blog posts I find particularly interesting . This is no small task . There are tons but not uncountably many very interesting Math blogs out there . There are certainly too many for me to keep up with . Plus , I don’t have a clear set of criteria for determining if a blog or a blog post is interesting so I can’t go through some checklist and make an objective evaluatbion . Basically , this is a right-brain exercise . If I like it

  • Happenings – 2010 Aug 14

    Updated: 2010-08-14 16:43:05
    Well, I’ve been playing a time-wasting computer game… an old DOS game called Ascendancy…. It required that I re-install Windows on my Mac, which is the only reason I haven’t been wasting even more time! Grrr! Still, I looked at a little math during the week. I may have found a way that I can [...]

  • Funding Opportunity: ING Unsung Heroes

    Updated: 2010-08-09 21:56:42
    For some teachers, classroom budgets are tight this year. Here at DreamBox, we’ve been researching possible grant opportunities for educators looking to fund DreamBox Learning, and came across ING’s Unsung Heroes award. Applications are now open for the 2011 awards, and are due April 30, 2011.  Educators chosen receive $2000 to help fund innovative class [...]

  • Couple of carnivals and a clever clock conundrum

    Updated: 2010-08-08 20:42:55
    Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Couple of carnivals and a clever clock conundrum August 8th , 2010 by Sol Two Math carnivals have recently been : published The 68th Carnival of Mathematics at plus magazine The 2nd Mathematics and Multimedia Blog Carnival at the Mathematics and Multimedia Blog . Now , here’s a challenging adaptation of a problem I recently discovered . I won’t reveal the source till later to not give away the . problem There’s something interesting about the time 2:26 and other times of the day . This interesting thing can be seen over 100 times per day . What is the property and exactly how many times does it occur in a day If you enjoyed this post , make sure you subscribe to my RSS feed 2 Responses to

  • Happenings – 2010 Aug 7

    Updated: 2010-08-07 17:03:14
    Okay, the introductory quaternions post went out last Monday. This weekend I expect to write about all four representations of three-dimensional rotations: rotation matrices, angle & axis of rotation, quaternions, and Euler angle decompositions. I wasn’t sure last weekend what I would do besides quaternions… it turned out to be a control systems simulation. Nothing [...]

  • Equalis Math community goes into beta

    Updated: 2010-08-06 23:21:55
    Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Equalis Math community goes into beta August 6th , 2010 by Sol On August 2nd the Equalis Math community went from super-secret mode into a public beta . I’m super-excited to be part of a community dedicated to . Math From the Equalis About Page Equalis is the innovative on-line destination for the mathematics community . It provides the most vibrant and far reaching math-centric community on the internet , enabling the free flow of ideas , cutting-edge research , open source software , problem solving , open innovation and job opportunities for individuals and organizations with a common interest in math and math-centric endeavors . Equalis provides a number of community elements : blogs ,

  • Review: 101 Things Everyone Should Know About Math

    Updated: 2010-08-05 18:13:00
    : Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Review : 101 Things Everyone Should Know About Math August 5th , 2010 by Sol A friend , who later started a home organization business , once told me that she believed everything we own should be beautiful or useful . That pretty well sums up my feelings about Math . 101 Things Everyone Should Know About Math provides a compilation of problems in the realm of useful . 8221 101 Things” has questions in eight : areas Facts , Just Math Facts Health , Food and Nutrition Travel Recreation and Sports Economics Nature , Music and Art Miscellaneous Bonus Questions Here’s one problem from the Health , Food Nutrition” : section A cake recipe says to put batter into two 8 round pans , but you don’t

  • Tonight: Calculus By and For Young People

    Updated: 2010-08-04 17:29:30
    : Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Tonight : Calculus By and For Young People August 4th , 2010 by Sol Sorry for the late notice . I just got back from vacation . The event will be recorded for future . viewing Calculus By and For Young People The free webinar is part of Maria Droujkova’s Math 2.0 Interest Group . series During the event , Don Cohen-The Mathman will have participants graphing things they have never done before and understand what graphing an equation or function means . He will show how to use his latest creation- A Map to Calculus , originally just a poster , but with the help of a former student Jonathan Storm , is now clickable Each spot on the Map links to his student’s work and sample problems from

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