[Assignments] Start By Date for Assignments

[raskinj]

I often find that student wait until the due date to look at an assignment. And, I also notice that the students who "preview" an assignment a few days ahead of time tend to demonstrate more learning on that assignment.  So... could you add a feature where the instructor can set a "start by" date as well as a due date? Or is there another way we can add to the To Do List and the Calendar a way to prompt students to start the assignment before the due date?

I already use unit maps and weekly reminders but I think having it appear in the To Do and Calendar would be a stronger nudge.  Thanks!!