I did my PGCE in secondary science several years ago but have been working in environmental education ever since. I recently went for an interview for a school post (didn't get it, went to the internal candidate) and in my feedback they commented that I didn't know as much about the latest ideas in science teaching as all the PGCE students they interviewed. Two things they mentioned in particular were my answers about assessment for learning and about the difference between a key stage 4 and a key stage 5 lesson. I've found loads of stuff about AfL so I can improve on that for next time but I've no idea what they were looking for in the answer to the KS4/5 lesson. Can anyone help or suggest somewhere I can go to find out more?