Seesaw in a K-1 classroom

https://drive.google.com/open?id=0ByWQx-OqH9gcY1pILVZVNUpFSWs

https://docs.google.com/document/d/12A510KI29hBxXVKsgNllj1L8ni_zLMff031NgMR7hg0/edit?usp=sharing