Thanks for your reply. Here's a link a link to a sample page from the tool I'm working on to show you what I mean http://www.imimic.net/read_sentence.asp?id=32
Would you leave it like this so teachers can use it in their own classrooms the way they like? Or would you add more functionality and/or content (e.g. a vocab pre-teach, comprehension questions, grammatical points, ... etc.)?