The NASUWT teaching union says an increasing number of teachers are facing abuse on social media, not only from pupils but also parents.
Head teachers say they cannot be expected to "conduct surveillance" on young people, after warnings that more might travel to Syria during the school holidays.
Schools who ask parents to pay for A-level and GCSE exam appeals risk discriminating against poorer pupils, says a teachers' union.
Two contrasting schools in neighbouring parts of Lancashire
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When people argue about free schools, they're often not really arguing about free schools, but what they think they will become.