I need a website that could help me in teaching a 10 year old boy with a down syndrome?

Question

He has a speech lag and very shy...

Answer 1

http://www.down-syndrome.org/  

This one looks a little more comprehensive.  If you read more about the nature of his or her commonalities before heading into the teaching section, it might make more sense.

Answer 2

http://www.altonweb.com/cs/downsyndrome/...

http://www.amazon.com/Teaching-Reading-C... (book)

http://specialchildren.about.com/od/down...

http://www.dsa-uk.com/DSA_lstLiterature....

http://www.ncbi.nlm.nih.gov/pubmed/10890...

http://denver.yourhub.com/Boulder/Storie...

Hope those help!  Kids with downs syndrome are so special, wonderful and fun to work with!  You are lucky!!!