1. No. Deal with them yourself. Deal with them now, as far as the school discipline policy allows. There are two things to consider here: > What if the teacher doesn’t come back when they are supposed to? You may be with the class longer than you think. They’re your responsibility when you’re there. > What if you have problems that spill over? School administrators talk to each other – you want your reference to say “Ichibun had good classroom management skills”. 2. Before you consider which students disappoint you, consider which students impress you. Which students made progress? Which students tried? You never know, you might be impressed with the effort of a student that the permanent teacher had written off, and this might make the main teacher reassess their opinion of the student. 3. That’s impossible to say – you’ll only know that when you get into the classroom. 4. By default, you should be deciding whether a particular activity is groupwork, pairwork or individual work.