Jean Piaget

• http://www.piaget.org/biography/biog.html
• muskingum.edu/~psychology/psycweb/history/piaget.htm

Lev Vygotsky

• http://www.psy.pdx.edu/PsiCafe/KeyTheorists/Vygotsky.htm
• http://www.newfoundations.com/GALLERY/Vygotsky.html

• http://www.pz.harvard.edu/PIs/HG.htm
• http://www.ed.psu.edu/insys/ESD/gardner/menu.html

B.F. Skinner

• http://www.ship.edu/~cgboeree/skinner.html
• http://www.mcli.dist.maricopa.edu/proj/nru/opcond.html
• http://chiron.valdosta.edu/whuitt/col/behsys/operant.html

• http://www.ship.edu/~cgboeree/bandura.html
• http://www.emory.edu/EDUCATION/mfp/effpage.html

• http://www.infed.org/thinkers/bruner.htm
• http://mercury.sfsu.edu/~ching/personal/Learning/theorists/bruner.html

Abraham Maslow

• http://www.ship.edu/~cgboeree/maslow.html
• http://www.pbs.org/wgbh/aso/databank/entries/bhmasl.html