Assignment Scores

I have 10 students of a class of about 20 on Khan Academy regularly.  I give them an opportunity to "test out" of a unit.  If they don't reach the desired score, I assign them the different skills within the unit.  Because they are all moving at a different pace, I assign them at different times.

This makes it difficult to read the "Assignment Scores" page because it creates multiple columns for the same exercise based on when it was assigned or its due date.  Is there a way or workaround that I could do this to simplifying the look?

With these 10 students, I've chosen to only assign them a section at a time.  I have found that they get quite confused when they have too many assignments on their assignment page.

Any thoughts or recommendations on how I can do this better for my grading purposes as I draw from the Assignment Score page?

Thank you,

Duane