Supplybychoice... The fundamental question which you asked your head has been ignored. You asked: Can you please inform me what qualifications Mrs Y has in teaching and in mathematics and for how long you expect Mrs Y to be teaching my daughter. The head has not answered your question and carefully evaded the issue of qualifications. It is neither here nor there whether the person is a HLTA. or a TA. That is not the point. Were she my daughter,then I would politely write back thanking the head, but asking what qualifications the teaching assistant has in Maths AND teaching! The crux of the matter! Let's not beat about the bush here!!!!