Science Buddies
Science Buddies: Balancing the Load: The See Saw as a Simple Machine
Have you ever tried to pull out a nail out of wood with your bare hands? Or have you tried to shove a staple through a stack of papers without a stapler? A hammer's claw, a stapler, a pair of pliers and a shovel are each examples of...
Scholastic
Scholastic: Dirtmeister's Science Reporters: The Lever
This site provides a description of the lever and its many uses.
University of Florida
Baldwin Library: See Saw
A scanned copy of the 1895 publication of See-saw by William Marshall Hutchinson, a book of songs for children.