Looking Educational Game Publishers

Hi Everybody,
I was wondering if anybody had any connections or know of any educational game publishers. I have about 5 educational games that I want to submit but I don't know many educational publishers. I know of Learning Resource and Educational Insights (I believe they are the same; Educational Insights being the subsidiary). If anyone has a list of publishers or info on how I can find some I would greatly appreciate any help. By the way, the games are aimed at high school level but can easily be modified to middle school or even freshman college level.
Thanks