Activity
Cut the Knot

Cut the Knot! Pick's Theorem

For Students 9th - 10th
This site explains Pick's Theorem and contains an interactive geoboard and activity to help understand the theorem.
Activity
Texas Instruments

Texas Instruments: Pick and Choose! Using Pick's Theorem!

For Teachers 6th - 8th
In this activity, students use the Geoboard to determine the area of any polygon using Pick's Theorem.
Activity
Science Buddies

Science Buddies: Divide and Conquer: Proving Pick's Theorem for Lattice Polygons

For Students 4th - 8th
If you like to play Tetris then you might like this project. You'll learn something interesting about the mathematics of complex shapes.
Unit Plan
BBC

Bbc: Pythagoras' Theorem

For Students 6th - 8th Standards
You can pick up some valuable pointers on how to apply the Pythagorean Theorem here. When you finish working your way through the pages you can take an on-line "Test Bite," and check your understanding.
Activity
Texas Instruments

Texas Instruments: Getting Started With the Ti Navigator: Picks Theorem

For Teachers 9th - 10th
This lesson introduces students to Activity Center and is intended to help students interpret representations of functions of two variables. The Activity Center will be used to investigate equations that represent a company's income,...
Website
Cut the Knot

Cut the Knot!: Interactive Mathematics: Geometry Articles, Theorems, Problems

For Students 9th - 10th
Contains over five hundred Geometry articles, problems, puzzles, and games. Some sites relating to circles are provided within this list.
Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Geoboard Activities

For Teachers 9th - 10th Standards
Math Forum provides a set of links to sites that are related to geoboard activities. There are several great links to lessons using geoboards. The links provide insight into how to use them, including how to perform various measurements...
Activity
Texas Instruments

Texas Instruments: Probability, Simulations, and Probability Distributions

For Teachers 9th - 10th Standards
Use simulation on the TI-83 graphing calculator to teach students about the distribution of sample proportions, distribution of sample means, the Central Limit Theorem, normal probability plots, and the Law of Large Numbers. Pick and...
Professional Doc
National Council of Teachers of Mathematics

The Math Forum: Using Geoboards in the Classroom

For Teachers 2nd - 6th
A thorough look at the extensive uses of geoboards in the classroom. Links are listed which give introductory information on geoboards - for teachers new to using them. Then, lesson plans are provided for using geoboards in teaching...