I've been teaching for about 25 years now and one thing I have learnt is this: a good teacher is always ready to learn. About 10 years ago, I was teaching students with learning difficulties in a school in Bristol. My classroom had become famous in school as I had got a reputation for success by students to believe in themselves. One day, the encouraging head told me that a trainee teacher had arrived in the school and had asked to observe my classes. As we were going to meet John, the head told me that the student was disabled. As John was approaching, I noticed that he had prosthetic