The link between the study of chess and enhanced educational performance is well documented. For the sceptical (most of whom are, according to Kevin O'Connell, amongst the English-speaking nations), here are some links to help you sort your ideas out.
Some quotes on Chess in Education
A detailed study on Chess in Californian Schools
Advice on how to start a School Chess Club
Jonathan Levitt's page on Chess and Education
Another American site devoted to Chess in Schools
Hansard record of Commons Debate on Chess