the inspectors look at data and then look for reasons why the data is poor. They find it, report on it, together with what the school should do to improve. I cannot see what is wrong with that really!
you don't see what is wrong with that?
well, for starters, statistically speaking, the "data" on the exam results of a cohort of children CANNOT tell you anything statistically significant about the teaching at a school.
That may seem odd, when so many thousands of people are willing to assume it does, but think about it for a moment. There are simply too many variables. A child's performance depends on how much support they have had at home, how much natural intelligence they have, which friends they are sitting next to in class, how long ago their last cold was, what time they went to bed the night before, what they had for breakfast, how mush the exercised the previous week, whether they have started puberty, and the state of their hormones, when their last growth spurt was, the state of health of their grandparents, the closeness of their relationship with a sick grandparent, the availability at home of the right book to revise from, the wage packet their father brought home last month, the tidyness of their bedroom, the temperature their thermostat is set at, the humidity that day, the time they woke up, what they watched on television last night, how much their mother compares them to their cousin, what their big sister has told them about the exam, etc etc etc literally ad infinitum.
You cannot get a significant measure of the standard of teaching of the school.
With that in mind, all school statistics have to be "cooked" to the best of the ability of the staff. "cooking" the stats and faking the evidence to go with it takes up a inordinate amount of teacher time. So much that it leaves less time for planning teaching and marking.
Therefore, the schools with the best cooked stats and faked data often get the best ofsteds, but have the worst teaching....
this is why the government is discussing lifting all restrictions on immigration for so many teachers.
Because so many tens of thousands of British teachers are refusing to return into the classrooms.
I could give you literally hundreds of examples of things I've seen schools do, which improve their chances with ofsted, but disadvantage the children.