Tracking Content that has been assigned in each class.

Could you please add a feature in the content tab where there would be a check mark or some type of marker or message showing the content I have already assigned in a particular class as I am scrolling through to choose assignments.  I have several different classes and assign multiple assignments each week.

This would be extremely helpful.

Thank you Khan Academy for all the recent updates.  They have improved my experience as a teacher using KA.  Keep up the great work!!!