at the college in devon they can help you to train it involved getting a certificate of education and they would help with sitting in on classes and allow you to teach occassionaly i am not sure if there is anything like this still available but it might be worth contacting your local college.its something i think about doing but i am hoping to take my daughter to the open day in june and it coopuld be a cert of ed or maybe the degree course they are offering anyway hope this helps best of luck