He acknowledged that "there are great leaders in all schools, including challenging schools" and added that changes to the Ofsted framework were designed to focus inspections on the "value added" - how much progress pupils make from when they arriveattheschool.
We can't get rid of the carcinogens in the environment, but we can make sure that our kids arriveatschool each day with a reusable lunch bag full of produce from the farmers' market.
Up until recently, the predominant approach has been frequentist statistics, the kind you most likely learned in school, which utilizes controlled variables and large sample sizes to arriveat conclusions that are statistically significant.