How do you get a theorem named after you? Euler knows what it takes! The third lesson of five asks pupils to use an interactive activity to compare the faces, vertices, and edges of seven different three-dimensional solids. They use...

A complete lesson on compounds, from introductory material in the beginning to a practice exam at the end. This lesson covers bonding, ionic compounds, molecular compounds, naming compounds, structural formulas, polyatomic ions, and much...

Access hundreds of teacher-tested, practical physics lessons on this well-organized, illustrated site. Find just the right demonstration, attention-grabber, or lab for any physics teaching objective at your fingertips.