I am embarking on a new career as a freelance teacher of MFL in primary schools but really don't know what to do about joining a union. I have 14 years teaching experience in secondary classrooms, so have always been in a union in the past. As I am only going to be working one day a week initially (after a career break), I really can't afford union membership, but know that I should probably have some sort of cover/back-up. Do any wise mumsnetters have advice for me on this? It would be greatly appreciated.