by Kim A. Howe, M.S.
Follow the course of invention throughout history as you learn about famous inventors and how their inventions changed the world. Identify simple machines and examine their use in complex systems. Imagine the future of inventions and draw your own Rube Goldberg machine.
This online unit can be used independently, but it is also designed to be used concurrently with the literature unit, The Invention of Hugo Cabret.