It's also possible the teacher never told the kids to turn it in, but has some system set up where they are supposed to know to put it in a certain box or file folder or something... that's how most of my kids' teachers from upper elementary on through high school set up homework return rather than asking for it to be handed in during class.

It sounds like things are going really well - I'm so happy for you and your ds!

Best wishes,

polarbear