In terms of the overall number of teachers, supply has been a challenge, and it's been a real challenge in a very buoyant labour market because fewer people have gone into teacher training. We can have lots of backwards and forwards, as we've done in the past, about what may have caused that, but one of the things we also know is that when unemployment goes up, the number of people who train to be teachers goes up at the same time. It's a reasonably secure form of employment, and the employment prospects are reasonably good. 