I have a member of staff off on long term sick (sick note being renewed every two or three weeks). Thankfully we have a good supply teacher in the class who has built a good relationship with the children. As time goes by, though, there is an increasing need for the wider role of class teacher to be adopted (i.e. termly assessments, parents' evening, staff meetings etc.). Can anyone tell me if I'm allowed to ask the supply teacher to take on this role as part of their supply work?