I've been out on trips (lucky me!) quite a few times recently, and have had my lessons covered by an in house cover supervisor. Several times I have returned to school to find my detailed, well explained and well resourced cover sheets annotated with 'students asked if they could do posters so we did that instead' type notes. I'm REALLY annoyed at how this person has completely failed to follow the instructions that I left. There have been no complaints about poor behaviour or any other mitigating circumstances which might have explained why she chose to let the students decide what to do(!), and as a result I am now returning to these classes to find them a week behind. Am I being naive to expect somebody who works at the school and knows the student to be able to supervise a basic but relevant lesson? Should I have just left videos for them to watch instead?! Given that this person is employed by the school, should I complain about this? And to whom? It has completely messed up my planning for what is already a short half term! Grr! For the record, this is NOT a rant about supply/cover in general, I have spent enough time doing that role myself to know that it is not an easy task and things don't always go to plan, but I'd never have dreamed of ignoring set work altogether.