Some schools are responding to pupil misbehaviour with a "blame-the-teacher culture", a union leader has warned.
Chris Keates, general secretary of the NASUWT teaching union, reflected on the organisation's annual conference in Belfast in a Tes video.
She said that pay, working conditions and pupil indiscipline were major issues.
Ms Keates added: "Teachers are feeling they are not being valued as professionals in any of those areas of their work."
She said larger class sizes and a lack of support for pupils with SEND in mainstream schools were contributing to an increase in pupil indiscipline.
She also raised concerns about a "blame the teacher culture" in how some schools respond to pupil indiscipline.