Nice Little Mathematics Movie

In this series of factorization diagrams, prime numbers usually make a single circle, while other numbers are grouped by their factors into colourful patterns.

Enjoy

Animated Factorization Diagrams 

which I found through StudyGeek (web, twitter, facebook, and a really cool tumblr feed of math-related images) 
UPDATE : or was it @PlusMathsOrg ?  Or @MAAnow ?  

We LOVE this factorisation dance on our sister site @nrichmaths http://t.co/Kd27utgNr9
— Plus Magazine (@plusmathsorg) March 24, 2014

Garry Kasparov was here

Along with Bill (Clinton) and Rafa (Nadal), Kasparov is one of the top five "famous" people I'll love to share a long lunch with sometime.  It looks like I just missed a fabulous chance to do so as he was in my country, my city, and in fact my alma-mater - the great Queen's College - last week.

Dang, Queen's College, why didn't you invite me? 

What I love most about Kasparov is how he turned from
supreme mastery of one extremely well-defined field (chess)
to
an application in a much murkier but more consequential problem (liberty and liberalization.)

Like him, I also think that life imitates math, life imitates sport, life imitates chess, life imitates art, and that it is good for the world's best minds to have the balls courage to attempt the world's biggest fixes (how to achieve happiness, eternal life, food/water, health, peace, class, etc)

I think the big lessons from the Kasparov switch are: 1. you have to know when to retire, that is, when to shift focus 2. sometimes try applying the best math to the biggest problems.

Yes, Abuja and Lagos! Great visit, great enthusiasm for chess. http://t.co/Qz3E23iK3k RT @TheDeji: Were you really in Nigeria recently?
— Garry Kasparov (@Kasparov63) February 5, 2014

You can teach Calculus without really needing to teach

And you can learn Calculus in about ten hours a week.

Check out these online courses: Precalculus, Calculus One, and Single-Variable Calculus.  Each is about three months (one semester) long, available on Coursera for FREE, and includes weekly video lessons, peer-interactions, testing and evaluation, and a certificate of completion.  I'll tell you when I evaluate other sources of online course materials: udemy, edX, and so on.

If I was assigned to teach a large Calculus class, I would probably just reuse these resources as it would be hard to do better than some of the online courses I've tried.  Even for a small class, I might embed this material, as in modularity, as in a course within a course.

From Calculus Single Variable on Coursera

 When using these online courses or MOOCs as they are now called, the teacher is still useful.  The teacher needs to study several and select which resources to use, and also to monitor and enhance the experience where possible. 

For more elementary mathematics, like primary and secondary school (but also up to Calculus and hobby math), I like the quizzes at Khan Academy for math drill.  Khan also has extremely, extremely good video lessons. 

What I'm playing these days

is Tetris,
as in Tetris Revolution on my Nokia phone.
I see it in my dreams, it's that bad.