Why Pi?

I recently attended an excellent Webinar, Slices of Pi, with Key Curriculum Press. In one of the activities, we investigated Pi in a rather unusual way: by looking at the ratio 22/7.

In honor of the upcoming Pi Day celebrations, I thought I'd share this with you and your students. Very interesting!

Pi Flower from (Chris) on Vimeo.

Walking With Henri and Emile!

Walking With Henri and Emile Sketchpad tutorial.

One of the learning goals for Unit 5 (Moving Straight Ahead) is "I can construct tables, graphs, and symbolic equations that express linear relationships."

I've put together a Sketchpad tutorial to show you (or your students) how the investigation with Henri and Emile can be represented using dynamic software. You may want to use this tutorial to teach yourself how to construct the representation and then lead your students through it, or set it up as an independent activity.

Have fun!

Representing Stories Graphically

The Geometer's Sketchpad can do so much more than build polygons! Use this sketch to help your 7th graders build their connections between graphic representations and real-world situations.

This sketch, while excellent for demonstration purposes, is ideally put into the hands of students so they can manipulate the variables and see how their actions impact the graph and the action.

Download the sketch!

Angle Sums Round Two

Angle Sums Round Two from (Chris) on Vimeo.

Okay, Springcreek - ready for round two? Download the Angles and Sums sketch right here.

Angle Sums of Any Polygon

I've created a couple of very short tutorials to assist students in using Sketchpad to investigate lesson 3.2 from Stretching and Shrinking. Here is the sketch to go along with them: Download Sketch



Angle Sums - Tia's Method from (Chris) on Vimeo.



Angle Sums - Cody's Method from (Chris) on Vimeo.