Hope these will help clarify Bruner's theory of cognitive development

http://www.infed.org/thinkers/bruner.htm
http://findarticles.com/p/articles/mi_g2699/is_0000/ai_2699000048/
http://en.wikipedia.org/wiki/Jerome_Bruner
http://www.lifecircles-inc.com/Learningtheories/constructivism/bruner.html
http://www.simplypsychology.pwp.blueyonder.co.uk/bruner.html
http://www.informallearning.com/archive/1999-0304-a.htm

This has a lot of material which can be intimidating but a wonderful example

http://nicefun.net/bruneras-model-of-learning-vt2693.html