We've heard from some teachers who want to use the student's Personal Deck for Do Nows/Warm Ups that sometimes if a student has too many cards due in the Personal Deck, then studying the Personal Deck becomes a discouraging experience. 

To help address this issue, we added a field for you to configure the max number of questions that can be due for each student on a "Personal Deck Assignment":

If you don't want a limit, and you want for all of the questions that are due in the student's Personal Deck to be pulled into the assignment, then leave the field blank.