Varying max grade for an assignment

[kmoore0]

Hello - I'm looking for a way to vary both the score and the max score for individual students on a classwork assignment. Let me explain:

I want to assign a weekly classwork score for students, worth the equivalent of 3 points a day. So if they participate fully, they'll get a 12/12 for the whole week. But if a student is absent (excused) for one day and otherwise participated fully, I don't want to give them a 9/12; I want to give them a 9/9. Is there a way to do this without having a separate classwork assignment for *every day* (which would be tedious).

Thank you!