 So what's the role of self-assessment in terms of deep learning skills? Wouldn't it be great if the students were able to become their own teachers? Isn't that surely the aim of lifelong learning and 21st century skills and metacognition and all the other fancy words we use? And so one of our tasks as we go through is to help the students pick up the skills of being their own teacher, knowing what to do when they don't know what to do, knowing when they're making a mistake, having a sense of understanding their own assessment. And this is where self-assessment comes in. And we take a very strong line that one of our fundamental roles in schools is to teach students to be assessment capable, to know how to interpret the tests. Like if I gave you a test back and you got 43 out of 60, I want to know, do you understand what that means? Do you understand where to go next? And unfortunately most students think 43 out of 60 is more than half that's it. That's not very rich information. That's not helping much at all. There is hardly anywhere to next there. And so how do teachers help students get better at drilling down and understanding what they know, what they don't know, what success looks like, when's good, good enough, when's it okay to stop learning more and start relating it? And so the more you can do that in terms of self-assessment, the better. Here's the irony. Five-year-olds are usually pretty good at that. By age eight, they've learnt to be compliant. They've learnt that it's the teacher's job. They've learnt that their job is to come to school and watch the teacher work. So how can we reverse that equation and get our students to be much more adept at doing their own learning? And so great classes ask the students to do a lot of self-assessment. They're actually quite good at it. As long as you focus on the learning, as long as you can focus on that difference between the surface and the deep, you're in really good shape. And some of our best students are our best students because they are very good at assessing their own learning.