I thought that home school teachers were removed from this offer already? Anyway, if it is still there, how would one prove they are teaching like in your example above? I mean they don't just let you place the order, there must be some checks at some point where you give some proof, or is there?
There is no way for Apple to check that you’re not a parent or an Amish homeschool teacher.
Apple resellers like Best Buy regularly have sales that match Apple edu prices, so you can tell Apple margins at regular prices are pretty high.