I would really appreciate any help with my difficulty. I think I tried nearly everything...
There is a course with ~240 students attending the same lectures. For practical exercises, they are assigned into six classrooms, and there is a separate teacher in each classroom.
I want to give these teachers an easy way to grade the submissions of "their" students only, without having to browse the whole list of students registered for the class.
How to do it? I tried to assign students to different groups and to prohibit the teachers to view other groups, but it seemingly has no effect on the "grading" interface.