Montessori Education
http://www.amshq.org/

Constructivism at New York’s Public Broadcasting
http://www.thirteen.org/edonline/concept2class/
.
Choice Theory
http://www.wglasser.com/

Multiple Intelligences Theory 
Harvard University
http://www.pz.harvard.edu/PIs/HG.htm
 
New Horizons website changed to
http://www.newhorizons.org/
and enter "gardner"

New York’s Public Broadcasting
http://www.thirteen.org/edonline/concept2class/