TeachEngineering
Teach Engineering: Solving With Seesaws
Students use a simple seesaw to visualize solving a two- or three-step mathematics equation, while solving a basic structural engineering weight balance problem in the process. They solve two-step equations on a worksheet and attempt to...
TED Talks
Ted: Ted Ed: The Mighty Mathematics of the Lever
Andy Peterson and Zack Patterson use the seesaw to illustrate the amazing implications and uses of the lever. [4:45]
Integrated Publishing
Integrated Publishing: Levers
A quite lengthy chapter on the simple machine the lever. Includes uses, classes, mechanical advantage, formulae, etc. A full discussion, with good illustrations.