This is a collection of websites that I have used over the years to assist my students with various concepts.
Organic Chemistry
General Chemistry
These websites are broad based and cover learning outcomes that are expected for Organic Chemistry I and II
www.masterorganicchemistry.com
www.droppinsciencefasho.blogspot.com
http://www3.nd.edu/~smithgrp/structure/workbook.html
http://www.organic-chemistry.org/ (for advanced students)
http://www.chemeddl.org/resources/stereochem/relationships1a.htm (for assistance with stereochemistry)
http://treefrog.fullerton.edu/chem/orm.html#acid (this site is excellent with animated mechanisms etc.)