Not really sure what the norm is with preparation time? My DS's Y1 teacher has 'official' PPA time on a Tuesday afternoon when the class have music and SEAL lessons. However the last 2 weeks the teacher has been out of the classroom on a Tuesday morning as well and there has been a supply teacher in. DS is not confident with adults he doesn't know, and finds change hard, so is upset and doesn't want to stay at school when this happens. I would prefer to be able to prepare him for having a different teacher, but don't want to make a fuss.