This option would go in the assignment links table. The teacher should be able to enable/disable an assignment link. If the link is in the disabled state, the student can no longer open the model (they would see a message saying the assignment has been disabled by the teacher instead).
This option would go in the assignment links table. The teacher should be able to enable/disable an assignment link. If the link is in the disabled state, the student can no longer open the model (they would see a message saying the assignment has been disabled by the teacher instead).