[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...

Brain binders are great teacher sources for problem solving and critical thinking with geometry. Students fold sheets of paper to create solid colors on each side. Various levels are included starting with two folds through five folds.

This fourth-grade geometry lesson teaches the definitions for a line, ray, angle, acute angle, right angle, and obtuse angle. We also study how the size of the angle is ONLY determined by how much it has "opened" as compared to the whole...

This video geometry lesson [6:14] explains the concept of perimeter and has varied exercises for students to practice.

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.