Why doesn' t the xp from stories not count towards assignments?
A lot of us are asking for that. For now, have your students take screenshots when the icon turns golden and send it to you.
I left a longer comment on another thread, but this is what I have seen in a nutshell: Students figure out quick that Stories is an easy way to inflate XP with minimum effort. I hope Duolingo continues to NOT include Stories XP in class assignments.