Good point. I've validated it with two professors who think it's worth pursuing (which also led to a couple lengthy discussions on educational theory).
Without wanting to put you off, most people will say that its a good idea if the service is free. It's a different story if they have to pay for it.
Are the professors your target market? If not, find your target market and validate with them.
Its so important that you validate the idea before spending all your time, energy and money on it.
Good luck with this, sounds like you're passionate which is a great start.
And you're right about finding a target market, the initial target would be others which I'll have to talk to.