Ofsted should just show up without notice, go into reception and introduce themselves and walk round lessons. They have cut down the notice to avoid the several month tidy up that used to happen, which now means in most cases that there's a whole year of stress when leadership know that they're due - an almost permanent red alert. A taxi should just pull up in the car park and 4 inspectors get out. If the head's not in then they should speak to the principal deputy. The we'd see what a school is really like and who's doing it and who isn't, instead of papering over the cracks. School I know well asks their ASTs (in scence and English) to take over the exam classes of weak teachers in subjects as diverse as food tech and P.E. Couldn't, of course, address the weaknesses in those subject areas? No, paper over the cracks and get us through Ofsted.