Odyssey of the Mind is an international educational program that provides creative problem-solving opportunities for students from kindergarten through college.

Paper by Kurt Bryan and Tanya Leise

difference tables -- cool technique for solving this!

"I want a thing that stores sparse matrices over N computers and I can do math on those matrices." Many links, not many answers... yet

essay by Shai Simonson and Fernando Gouvea

Links to a bunch of fantastic-looking lectures -- terrific self-study material

See bathsheba.com; she explains how she does 3D printing of sculptures into metal! ... and details all of the tools she uses too

So simple it's silly! And yet, not. The sequence of integers beginning as follows: 1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, ...

Answer: because the Babylonians counted to 60 on their hands. Neat.

bunch of interesting references...

The Human Obsession With "Formal Proofs" is a Waste of the Computer's Time, and, Even More Regretfully, of Humans' Time

In an otherwise business-like introduction to Mathematica , Jerry and I decided to include a couple of pretty hot-headed chapters about education and software. Here they are, minus the level-headed introduction to Mathematica.

"The fact it is an open-source alternative to Mathematica."

"Professor Jim Hefferon’s Linear Algebra is available as a free PDF download. But don’t be fooled by the price: Hefferon’s book is better than most of the expensive tomes sold in college bookstores."