I am a TA specialising in maths at a large high school, where our after school tutoring programme is in full swing - small groups of up to 6 students. The guidance on the government website says that tutors do not have to have QTS if they complete an online training course first. Apparently the funding is expected to be available next year too, so I may ask if I can deliver some sessions - has anyone out there done this as a TA or does your school prefer teaching staff?