After finishing the prototypes for the grader assignment view, I moved on to re-designing the group formation tab.  Here are some prototypes:

Group Formation: Adding a student to a group

Group Formation: Removing a student from an existing group

Group Formation: Filtering -- Only show valid group formations

Group Formation: Filtering -- Only show invalid group formations

They can also be found on the MarkUs project blog here.  These prototypes will be used in a simple usability session this week, and I will be reworking these prototypes according to the usability feedback we get from the session.  More updates to come! :D