My students turn in homework via the discussion board. If they don't meet the requirements, they are allowed to resubmit. I used to get notifications (in my to do list) when students resubmitted to discussions- but I don't any more. I don't want to get notifications for every first submission (because that would be insane). I've thought about leaving the assignments ungraded, but that doesn't quite work either- I want students to be notified. 

Is there a way to be notified when a students submits a previously graded assignment? Where'd this feature go?