I'm in the process of applying for teacher training for this Sept 2017. I've just discovered "cover supervisors". Would this be acceptable school experience for someone who hasn't even been accepted on the teacher training course yet? I'm also aware that some cover supervisors are asked to "teach", contrary to recommendations by the unions, for obvious reasons. If a post was advertised as non-teaching, but a school then took advantage of being there, how should one respond?