Question: Is it permissible for Ustaadh’s to take work from their students?
Yes this is proven from the Ahadeeth. Hazrat Anas Radiallahu anhu was sent to Nabi Sallallahu alaihi wasallam for his khidmat by his mother. By doing chores for the Ustaadh the student becomes accustomed to responsibilities. The Ustaadh does not need the khidmat, it is the student who needs to do it for his own goodness.
Fataawa Mahmoodiyyah Vol 23 pg. 271