Students construct a balloon-powered rocket car from a Styrofoam tray, pins, tape, and a flexible straw, and test it along a measured track on the floor. They experiment with ways of increasing the distance the rocket car travels.

Fourth graders build a balloon hovercraft, take direct measurements, answer critical questions, and make calculations using the data gathered in order to see the concept of acceleration as a change in velocity. They use a worksheet...

Students examine and study how changes in perspective can change the way that they can observe objects. They explore the relationship between a scene's area and its detail. Each student looks at the ground through cardboard tubes from...