Presented by:
Ihor Charischak

CLIME Connections


Come and see examples of how Web 2.0 and dynamic software can transform math learning and teaching. Participants will experience a series of unique and compelling collaborative activities that incorporate significant software environments (spreadsheets, Sketchpad and Web applets) that will help a teacher to engage students in gaining a deeper understanding of powerful mathematical ideas.

updated: 7/27/16

Video of Keynote Talk

Current list

DMC Blog

Road Sign Problem
Buffon Needle
Motion Math
Jiji Math
Wuzzit Trouble
Number Bonds
Desmos - Butterfly
Dan Meyer - 3 Acts
When Desmos Fails
What is Algebra? - Keith Devlin

The Wannado (Math) Curriculum - A Math Teacher's Journey to the Math 2.0 Classroom

Measuring the Earth Project

When will Technology’s Promise be realized in Math Education?
Research & Innovation
in Teaching Math with Technology
Tuesday, 7/12/2016


Set the Stage: Overview Math 2.0
Warm-up video: Hans Rosling's dynamic video (4min)
*Don't Panic - the facts about population

1 Jinx Puzzle
Pick a number,  Add 11, multiply by 6, subtract 3, divide by 3, Add 5, Divide by 2, and subtract the original number. Surprise - you have been jinxed.
For spreadsheet entries click here.
Blog entry - link Jinx puzzle lesson - link
Jinx calculator - link
Proof - marbles & bags - link

2 Fermat's Last Theorem Debunked?
In an episode of the Simpsons, Homer appears to write a valid solution to debunk Fermat's Last Theorem which was proven in 1995. Is Homer's effort a real counter example?
Source: The Simpsons and Their Mathematical Secrets - Link

Did Homer solve Fermat's Last Theorem? - Link
Math Stories - Engaging students in thinking about mathematics - Link

3 Average Traveler Activity
Today we are going to find out who traveled the average distance to get to this conference. First we'll start off with a guess. What do you think is the average distance that the members of this group traveled today? Link to activity
My blog entry about this activity - link
4 The Weird Number
The story of the Weird Number is a delightful excursion into a fantasy world of a town inhabited by natural numbers. A robbery occurs that helps them to learn they are rational numbers. But nobody could believe that there were strange numbers living in the dark woods that weren’t rational.

5 A Pi Day Mystery
My favorite Pi Day activity is the one where random needles dropped on parallel lines lead to an approximation of Pi. Why Pi? Good question. We'll answer that in this story.
George Reese's explanation.

The Great Green Globs Challenge
What is the highest score you can get for this array of Globs? (Link) Globs Blog entry and Video tutorial intro (3:40)
Video: Green Globs meet Parabolas (3:44)
Neil Cooperman - Green Globs Contest (1995) - video (12:30)

7 Measuring the circumference of the Earth Project
Over 2,000 years ago Eratosthenes made a remarkably accurate measurement of the earth's circumference. This project is a recreation of that measurement and requires collaboration of students in places at different latitudes on the earth to make shadow measurements, share data, use a spreadsheet (optional) to make comparisons, and then replicate and share their results.
In the Spirit of Eratosthenes: Measuring the circumference of the earth - Ihor's article
Every March and September
- Collaborative Project Website
Carl Sagan tells the story of Eratosthenes (Youtube)