Parents, voters, ministers – do the maths: if we run out of teachers, who will teach our children? | Gaby Hinsliff

It’s a recruitment and retention emergency when even desirable schools can’t fill vacancies. This is what a crisis looks likeLucy Kellaway loves teaching. She came to it remarkably late, deciding to retrain at 58 after a long career in financial journalism, but is so evangelical about the switch that she set up a charity to help others do the same. Now Teach has since supported more than 800 people into the classroom, many leaving lucrative careers in banking or law and disproportion