I am at a new school on long term supply and have some challenging classes. Ordinarily, with groups that are not hard work, I compromise on letting students out to go to the loo, when they've completed work for example. With some groups I don't need to do this, they go as and when they need. I suppose it's an issue of how trustworthy or mature the student is. In the more chaotic classes I get constantly pestered by students who need the loo. I know they are taking the **** (pun intended), and I really think they should learn to wait, and CAN wait. If a student has a medical issue for needing the loo they will have a note. But I don't want to deny the fundamental right to use the loo! Can I issue a blanket ban on trips to the loo? or let them go 10 minutes before the end? or stick to my rule of only when their work is finished. I feel like this is an issue about boundaries that I should have got clear in my head ages ago, but for some reason haven't. Looking for advice. Many thanks.