But we still need to rely on the trends from a distance. If we take your argument that 2017 was an unusual year and the trends up to 2016 were positive, in a few years' time, when we will be looking back in two years' time, how are we going to measure this progress, say, in 2019? What are we likely to see and what methods are you going to use to measure progress that way?
Well, you'll be aware that we are moving away from level 2 plus as a performance measure anyway because of the—
So, what performance measures will you use?
So, for the lack of sophistication around the level 2 plus, and for the unintended behaviours that that particular performance measure has driven within our schools. I'll be making a statement shortly to the Assembly around a new performance measure for schools. We were, at our most recent secondary heads conference, working with schools to develop that. What's important to me is that we have a more sophisticated model that looks at school performance for all children. What level 2 plus does is narrow, very much, the focus of schools on an individual part of the cohort, usually the C/D borderline, which is why then we have problems with the number of students getting a B grade or above. We have marked success in our schools by saying to schools that a C is good enough. Well, if a child gets a C but came to you in year 7 and they were destined to get an E, yes, indeed, a C is a success, because you've moved that child on; but, if that child came to you destined to get an A* and gets a C, then we haven't done a good job by that particular child. So, we need a performance measure that is much more sophisticated, looks at each individual child, tracks that progress, and measures the value added by that school in performance.