Is one a week the normal school policy for all the teachers, including any long term supply?
Jeez, it does make me wonder how the bloody hell people have time for this. Who's covering their classes whilst they do all this observation? Or if they have that much free time why not teach the classes themselves and not bother getting a supply teacher.
Seriously, we have 2 observations a year. Slightly more if you are an NQT.
Is it the same person? I just think you ought to ask them if its ordinary practise to observe once a week or if they are making an exception for you as you are supply and perhaps they weren't convinced after the first observation?
Tbh we have quite a few long term supply teachers at the moment as a fair few people have gone on maternity leave. I would be surprised if they had been observed more than once.