The  Molecular Shapes download came from:  Downloaded from Teachers' Domain, http://www.teachersdomain.org.© 2007 ChemThink. All rights reserved.  This media asset was adapted from ChemThink.   Teachers' Domain Collection funded by National Science Foundation.  

A useful website:   http://intro.chem.okstate.edu/1314f00/lecture/chapter10/vsepr.html
Another useful site: http://www.kentchemistry.com/links/bonding/lewisdotstruct.htm