This is just a general alert to newbies like me about how the Perusall Gradebook Average column functions.
It appears that each time you create an exception for a single student on an assignment, the system extends the due date for the entire assignment. That, in turn, removes it from the Average column. You can see the problem in the image below. Because I created exceptions for a number of students on most on the assignments, they are excluded from everyone's averages for the time being (as indicated by the little renewal swoosh next to the assignment title). As you can see, the only assignment in this class that is registering is the first one. The good news is that, as long as the students have clicked the links correctly on BLS to sync the grades with the BLS Grade Center, BLS will calculate the correct averages (assuming you created an average column in the BLS Grade Center, that is). It took me a bit of head scratching to figure out what was going on, so I thought I'd share. There is an explanation of how the average column works on the Gradebook page, but it assumes that you understand why the various assignment are not yet past due for all the students – hence my head-scratching.