Get hundreds of interactive activity plans using the Zome Modeling System. Among dozens of lessons, a first exposure to similar triangles can be very visual for the learner. Here, young geometers explore the number of different shapes...

Students conduct experiments with balloons, pennies, marbles and cups to help them understand the concept of centrifugal force or Newton's Law of Motion.

This video segment explains centripetal force and illustrates how roller coasters rely on it to give you a thrilling ride. Includes background reading material and discussion questions. [4:40]