The missing assignment feature is a great resource to school advisors and parents. One thing that would make this feature easier to manage would be the ability to turn off notifications for missing assignments past the end of the marking period.
For example, if a school is set up for 9 week marking periods, and a student had 5 missing assignments for Q1, once Q2 starts, there should be a toggle to "show/hide missing assignments from previous marking period." Many parents and advisors I talk to would love to be able to wipe the slate clean and not have to scroll through a bunch of old notifications that are no longer relevant. I don't think they should completely go away and I can see value in being able to review the full year of missed assignments from time to time, so that's why the ability to toggle old missing assignments on and off would be ideal.