I signed up for the free trial, but we haven't had time to do any yet - they look fun.

I am curious how people use these. For enrichment, I assume just watch the Gizmo that is interesting. But for HS'ers, what sort of teaching, assessment, etc. would you do with it? Does it come with additional materials (I admit that I signed up and then got super busy and just haven't played around with the site much yet).

Cat