According to Microsoft's Neil Thompson educational games are something that the game industry needs to stay away from as they will take all your money and destroy you:

[QUOTE]"We're in the business of producing fun, not education," offered Thompson. "It so happens that certain products we produce have educational value. We're in the business of creating fun entertainment and the moment we try to pretend we're in the business of education we've crossed the line and it's dangerous for us as a company and as an industry.

"We've got to concentrate on producing great quality commercial products that will sell, because it costs too much money to get that wrong," he added. [/QUOTE]

He says to leave these games to educators and the government.

[url]http://www.gamesindustry.biz/articles/thompson-educational-games-will-lose-you-money[/url]

Personally, I think he from a business perspective he is right. If you want to make massive amounts of profits, you don't want to do educational games. But there is still a market for them and when done in conjunction with educators they can be done well.

True you won't be creating the next 10 million selling blockbuster, but you will be creating a game kids will use and learn from.

Math Blaster anyone?