As HoD at a prep school (around 500 pupils) I have a budget of £9.50 per year per pupil. Years 3-6 are relatively cheap to fund. Years 7 and 8 are quite expensive - the text book is £20 for example, and needs replacing every 3-4 years. Chemicals cost £300 a year, replacement glass wear about the same. Can anyone tell me what they think is reasonable?