The TES survey was based on 1,214 schools in England at the end of the summer term and comprised a three-page questionnaire. It was random and representative and sent to 1,005 primary schools, 33 middle and 176 secondary schools. It had a return rate of 44 per cent - 42 per cent from primaries, 48 per cent from middle schools and 51 per cent from secondaries.
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