Cut the Knot
Cut the Knot! Pick's Theorem
This site explains Pick's Theorem and contains an interactive geoboard and activity to help understand the theorem.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Geometry and the Geoboard
This site is a lesson plan for using a geoboard in a sixth grade geometry class. The lesson serves as an introduction to the geoboard and its uses in geometry. Some topics the lesson covers include helping to visualize shapes and and...