Your presenter today is:

Ihor Charischak

Council for Technology
in Math Education

"Come and hear some stories about unique and compelling ways that the Internet along with dynamic software such as Geometer's Sketchpad, Spreadsheets, Microworlds and Java applets can play a significant role in helping students gain a deeper understanding of powerful mathematical ideas." - Ihor

CIESEmath Activities

Wealth and Health of Nations
Hans Rosling


The Last Digit of Pi

Dan Cohen tells the story of Pi and the obsession for finding the "last digit." - Link
Buffon's Needle Activity - Lesson
Archimedes approximation - Link

2 Fermat's Last Theorem - Simpson Version
In an episode of the Simpsons, Homer appears to write a valid solution to defeat Fermat's Last Theorem which was proven in 1993. Is Homer's effort a real counter example?
Source: The Simpsons and Their Mathematical Secrets - Link
Math Stories - Engaging students in thinking about mathematics - Link

3 The Famous Jinx Puzzle
Pick a number,  Add 11, multiply by 6, subtract 3, divide by 3, Add 5, Divide by 2, Subtract the original number. Why is this called the Jinx puzzle?
Watch a Flash video of the proof.

4 The Noon Day Project:
Measuring the Circumference of the Earth

 Blog entry - Link

This activity recreates the experiment that Eratosthenes did 2200 years ago where he used shadow measurements to measure the circumference of the earth.

5 The Great Green Globs Contest

What is the highest score you can get with this array of Globs?