Sir Michael Wilshaw, head of education standards watchdog Ofsted Susannah Ireland Weak headeachers are responsible for too many of the country’s brightest teachers quitting the classroom, the chief schools inspector has warned, as the Government called for precocious twenty-something recruits to be fast-tracked into headships. Sir Michael Wilshaw, head of the education standards watchdog Ofsted, called for more “battlers, bruisers …