don't show the view if there aren't any assignments
don't show the view if there aren't any assignments

jasnow/classroom,ConnorCartwright/classroom,mkcode/classroom,hackerkid/classroom,mkcode/classroom,jasnow/classroom,ConnorCartwright/classroom,hackerkid/classroom,hackerkid/classroom,mkcode/classroom,BelieveC/classroom,BelieveC/classroom,BelieveC/classroom,ConnorCartwright/classroom,BelieveC/classroom,jasnow/classroom