## Big Mangahigh announcement

*[ Editor's note: Daniel Bauer from Mangahigh.com sent me the announcement below. Note that I have no experience with the site so I'm not endorsing it. But, I think it's worth spreading the word. ]*

Hi Sol:

Wanted to share the following with you before we send out the official announcement March 30, 2011

Mangahigh.com, one of the world's first, web-based programs for K12 mathematics - is going to be announcing publicly on March 30, 2011 that all of our premium features are now available to all K12 schools completely free!

See details below - with budget concerns around the nation and education, we are thrilled to be able to offer the very first complete (content, games, analytics and more) math resource to schools without asking for one penny.

Mangahigh is Free NOW. Any School / Teacher can go to www.mangahigh.com and create their school account.

See details below; we hope that you will help us by getting the word out before our National Press Announcement on March 30, 2011. Please call me if you have any questions.

Regards,

Daniel

*************************

## Wild About Math bloggers 3/18/11

I hope you all had a great Pi Day!

I learned from the 360 Blog that Brainfreeze Puzzles is running a Pi Day contest. No, you didn't miss the deadline. Entries are due on June 1, 2011. Check it out!

Vi Hart joins the Tau Day bandwagon with a great video, Pi is (still) Wrong.

[youtube]http://www.youtube.com/watch?v=jG7vhMMXagQ[/youtube]

Antonio Cangiano has a review of You Can Count on Monsters at Math-blog.com. Here's a brief description of the book from Publisher's Weekly:

This compact, innovative book counts to 100 using prime numbers represented as monsters, each with identifying characteristics (two resembles a bee with two buggy eyes, and three is an angry-looking triangular creature). The book opens with explanations of multiplication, prime and composite numbers, and factor trees, then moves on to a list of numbers. Each prime number looks unique, while composite numbers are represented by scenes involving their prime monsters (eight is illustrated as three of the beelike twos, i.e., two times two times two. Readers may have difficulty deciphering the pictures, which come to resemble little works of abstract geometric art. But especially for creative learners, visualizing the roles each monster plays may lead to deeper number sense. Ages 4 to 8.

## Discover Equalis and they’ll donate money to the relief effort in Japan

Equalis is the math-centric community that I've been blogging at for a number of months.

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.

Help Equalis to increase participation in their community and they'll contribute money to the Japan relief effort.

We have all been touched by the devastation in Japan. You can help us raise money for the relief effort just by using our website. Equalis will donate $1.00 to the Brother's Brother Foundation for each of the following through April 30th:

- Refer a Friend who registers with the Equalis Community
- Ask or answer a question in any one of the non featured forums
- Post your own Tip of the Day in any Open Source Software group
- Add a blog to any Equalis group

## Wild About Math bloggers 3/11/11

Welcome to the 3/11/11 edition of Wild About Math Bloggers!

The Mathematics and Multimedia Carnival #8 is up at DavidWees.com.

If you happen to be in the Santa Fe area, or know of someone who is, check out my Math Exploration Groups (aka Math Circle). I have one coming up Wednesday.

Salman Khan, founder of the Khan Academy, has a very inspiring TED video. His non-profit's ideas and software could revolutionize Math education, although I'm not a fan of doing lots of drills.

## Wild About Math bloggers 3/4/11

Welcome to Spring, at least here in Santa Fe, where it's 60 degrees! Just a few weeks ago it dipped to -10 degrees here. Onto Math ...

James Tanton has a really great, very accessible, four part introduction to the Partition Numbers and to the hunt for structure in these numbers. Here's the first video:

[youtube]http://www.youtube.com/watch?v=9k9xL9w7-3w[/youtube]

Patrick at Math jokes 4 mathy folks has a great puzzle:

Append the digit 1 to the end of every triangular number. For instance, from 3 you’d get 31, and from 666 you’d get 6,661. Now take a look at all of the divisors of the numbers you’ve created. What are the units digits of the divisors for every number created in this way? Can you prove that this result always holds?

Hat tip to Brent.

## Must-see TED glimpse at the future of education

This TED talk by Salman Khan totally blew me away. Check it out.

## March Math Exploration Group in Santa Fe

If you're in the Santa Fe area come check out my free monthly gatherings. The next one is March 16th.

Come explore mathematical ideas in a creative way that combines left- and right-brained ways of perceiving.

Whether you love math or wish you could, come to our monthly gatherings where we’ll use guided explorations and other techniques to solve interesting problems. The aim is to make math fun and understandable. We’ll cover several topics each meeting and we’ll do so in a lively way. Plus, we’ll leave no student, child or adult, behind. Each exploration will have sufficient depth to allow everyone to learn something. And, while we’re going deep we’ll keep it simple.

I'll be hosting our next Math Exploration Group on Wednesday March 16th at 7pm. We'll dive deeply into a very simple yet rich topic, parity. Parity refers to things that have two states, like even or odd, or black or white. You'll be absolutely delighted to discover what interesting problems present themselves in the exploration of parity. We'll play games and do fun explorations that will give you the experience of the joy of Math much beyond anything you've ever studied in school.

All Math Exploration Groups are suitable for motivated middle school students as well as for adults.

Your mathematical guide is Santa Fe resident Sol Lederman, author of the very popular Wild About Math! blog. Sol is also a recent Citizen Teacher at De Vargas Middle School where he taught a hands-on apprenticeship, Mad Math Magic, that sparked a sense of wonder through easy-to-make tricks that have a mathematical basis. While Sol makes his living in the computer industry, his true passion is transforming bad relationships with math through lively explorations that expose the joy.

Directions are here: http://sfcomplex.org/contact-us

## Wild About Math bloggers 2/25/11

Welcome to the 2/25 edition of Wild About Math bloggers!

Shecky identifies two 'bite size' Math books.

There are a lot of 'bite-size' books out now that introduce readers to a range of key mathematical ideas without getting too technical or too deep (but not too simplistic either). Thought I'd just mention two of the ones I particularly like for anyone not already familiar with them

One of the books he mentions, 50 Mathematical Ideas You Really Need To Know, is a really excellent book. The other, Mathematics: A Brief Insight, is one I'm not familiar with.

Have you ever heard of nomograms? If not then you're in for a treat. Ron at Dead Reckonings reviews a new book, The History and Development of Nomography. Ron also has a nice introduction to nomography here.

James Tanton has a nice 3-part video on Curry's paradox and on area. Here's part one.

[youtube]http://www.youtube.com/watch?v=eFw0878Ig-A[/youtube]

## Wild About Math bloggers 2/18/11

I hope you had a great Valentine's Day.

Denise at Let's Play Math has a nice post "Be My (Math) Valentine." Yes, by the time you read this it will be too late but you can start preparing for next year. Here's a YouTube video on how to make Mobius strip valentines. Denise has other ideas in her article.

[youtube]http://www.youtube.com/watch?v=zuUtAWtbVHo#at=79[/youtube]

Still on the Valentine's Day theme, 10-Minute Math has an article: Valentine’s Day heart graphs.

Antonio Cangiano has a nice post listing 30 great Math books as recommended by our readers.