So, would you be confident about this, in the next few years, feeding through into an improvement in Programme for International Student Assessments, rather than a further deterioration?
Yes. I think that if we did what Darren was talking about, getting more schools to share good practice, I think it will expand and more schools will take it on, yes.
Okay. On the sharing of good practice, you put emphasis in the report on this being an improving area and trend for the future as well, but I think you did raise concerns that it wasn't monitored or evaluated sufficiently well, particularly where one school was supporting another. How should that be done better?
Well, I think this has been a theme of many of the issues we've raised: that, whatever the initiative, you can't tell whether it's been successful or not unless you evaluate it properly. So, those evaluation skills, I think, are very important. I think that, with the development of the national academy for educational leadership, I would hope that research skills and evaluative skills would be part of the kind of training that headteachers get that maybe in the past they didn't. So, that becomes more of the day-to-day work of schools—that naturally, whenever you do something, you evaluate it afterwards. We've evaluated a lot of the school-to-school work. We've published two or three reports on it, and we've identified what we think is good practice and not-so-good practice.