Teachers teaching teachers, is there pedagogy for that?

So far in my teaching career, I have attended two training sessions both with the aims of aiding the teacher with knowledge of how to teach pupils with English as an Additional Language (EAL). After attending one of these sessions at a Computing at School conference today, I began reflecting on the actual pedagogy behind teaching teachers about these matters. Both sessions began with the session leader conducting the training in another language: in one the session leader began talking to us in Spanish (although I can speak Spanish), and the other gave us an activity written entirely in Polish. I thought that this was a very useful method to get teachers to reflect upon their lessons and the language that we take for granted. Putting ourselves in the pupils shoes is often difficult when we already know the knowledge we are trying to convey, but if we do not know a language it is easier to empathise with EAL learners. This is often one thing that I am guilty of forgetting, I will ensure that when planning lessons for EAL pupils I think about it from a non-English speaking point of view and invoke the use of sound and pictures to convey the meaning.

However, this got me thinking about the overall teaching of teachers. Who trains these teachers to teach teachers? Is there a pedagogy that trainers must understand to teach pedagogy to teachers? It would be very interesting to research into this and find results, watch this space.