If they can't sue you, then they just buy you.

http://en.wikipedia.org/wiki/ANGEL_Learning

That's standard practice in education. It's very hard to sell new products in that market, and customers rarely switch products regardless of how badly they're treated. Acquisitions are the only way to grow quickly. Every large company serving the education market is a patchwork of milch cows acquired over the years and squeezed until dry.

That's something I suspect Apple doesn't have to worry about.