Thanks for replying!
Yes, indeed, ideas are cheap.
But I have to point out one thing: implementation can also be cheap; get it working first, then think about scale. I know everyone aims for the hockey stick, but before you can get there, do something to monetize, even if it is small scale. For example, point 1 above, I am already doing it. I am already thinking how to make a simple document I can send to my students along with a link to your site that would make the learning experience worthwhile for them. Make that simple for me to do and you have a way to money. If you need to think about how to implement: to start, just put out ideas (use cases but in a simplified form that users can understand) of how people can use your service. Maybe throw up a couple of PDFs or blog posts with basic outlines of how teachers or students can use your service. Think of them as help files. Set up a forum where people can discuss what they are doing with your site and share ideas. Both of these ideas are simple to implement (simple PDF downloads/wordpress and a forum with simple moderation). From there you can gather data to move onto monetization (I hate that term, monetization, can anyone offer a better word?) I will email you via your contact form, but honestly, I want to compete with you!