Students explore lines of symmetry. For this symmetry lesson, students divide and combine shapes along basic lines of symmetry. Students explore symmetry in real life objects.

Students estimate and accurately measure the size of angles communicate with the appropriate geometric terms and symbols to describe and name angles, lines, line segments, rays

In this lesson unit from the Science Teachers' Association of Ontario (STAO), students fold paper to explore the properties and shapes of materials that give structures their stability and strength. They record their ideas as they...

[Free Registration/Login Required] An animation to illustrate the effects that different tectonic stresses have on rocks. Also included on the site is a short quiz over tension and compression.