Thank you very much for this. I had to leave a cover lesson and being a supply teacher I wanted it to be a great one that the cover teacher and the class would be impressed with. The Year 8 class were loud but very bright. The cover teacher saw me an thanked me for leaving an interesting lesson and said that the students loved it and got really involved. I also used it as a one off lesson with two Year 7 groups and they loved it too.