There have few educational site. You got more information from here.
www.champs.com
www.bbcjanala.com
http://forum.matholympiad.org.bd
www.biggani.org
www.gonitpathshala.org
www.poralekha.combd/rorum
www.bdword.com
http://bn.wikipedia.com
www.gutenberg.com
www.sarabangla.com
