Use this comprehensive pre-instruction assessment tool to focus your teaching where your class needs it most. Multiple choice questions assess your budding geometers' conceptual and vocabulary knowledge, but they do not solve any...

How do you know you know? Prove it! The guide goes through several examples and includes a link to a video to teach learners how to work through coordinate proofs. The goal is to prove that different shapes are indeed that shape. 

[Free Registration/Login may be required to access all resource tools.] This concept teaches students two ways to represent three dimensions in two dimensions: cross-sections and nets. Students examine guided notes, review guided...

Geometry lesson on line symmetry with practice exercises.

This geometry lesson defines equilateral, isosceles, and scalene triangles, and has a variety of exercises, including drawing exercises.

This geometry lesson and video explain angle measure, how to measure angles with a protractor, and has varied exercises for the students.

This site provides a comprehensive index and general directory to math sites that will help students in the study of circles.