Remember the first time you stepped into the classroom of an experienced teacher to observe their lesson? Did they make everything seem so easy? Were you swept along with the rest of the class in the energy of the lesson? Or bored to tears because you didn’t know what you were looking for; keen to get on with teaching your own class? If you have student teachers in your school, this is likely to reflect part of their school experience. Described in Lortie’s seminal Schoolteacher (1975), teacher training is an “apprenticeship of observation”; learning through observing others is an integral part of all Initial Teacher Training (ITT) in the UK.