The government’s teacher recruitment and retention strategy for England contains much that is sensible and desperately needed. Key recruitment targets have been missed for six years in a row. In some subjects, and some parts of the country, shortages are acute. In physics, for example, the number of trainees last year was just 47% of the number sought. Bursaries trialled on maths graduates appear not to have solved the problem. A third of new teachers give it up within five…