Information on Levers:

Gega, P.C.  (1990).  Simple machines and how they work.  In Science in Elementary Education, 6^th Ed. (pp. 365-402).  New York:  Macmillan Publishing Company.

Griffin, O.D. (2005).  Machines. In Microsoft Encarta Online Encyclopedia, 2005.  Retrieved October 27, 2005, from http://encarta.msn.com/encyclopedia_761562252/ Machine.html#p2

Images:

Carin, A.A., Bass, J.E., & Contant, T.L.  (2005).  Teaching Science as Inquiry.  Columbus, Ohio:  Pearson Education, Inc.

(2002).  Microsoft Clip Organizer.  In Microsoft Office Tools 2002.  Microsoft.

Levers:  Home

Class 1 Levers

Class 2 Levers

Class 3 Levers