Bad pupil behaviour and huge workloads are driving new teachers in England out of the job after only a few years, new research reveals.
Ministers will next week unveil new proposals to stop the "brain drain" as it emerged that 40 per cent of new teachers are no longer in England's schools. A similar trend is said to be affecting Wales.
The authors of the study, Becoming a Teacher, have called for a campaign to win over the disillusioned.
The new figures show the Government spends up to pound;68 million per year training teachers who do not stay in the profession. The study found that three out of five teachers who quit move on to new jobs outside education, attracted by higher pay and smaller workloads. Others want to spend more time with their families.
England's General Teaching Council, which commissioned the six-year study, said beginner teachers needed support, including managing pupils' behaviour.
The National Behaviour and Attendance Review report, launched in Wales earlier this year, also said there should be better teacher training to deal with rising incidents of bad behaviour in the classroom.