It argues that an increase in pupil numbers and more school leaders retiring and leaving the profession early, along with increasing demand for senior staff to work at academy trusts, means that more people are needed to step into top roles.
Future studies with active controls are needed to evaluate its full potential as a permanent component of police academy training.
But guidelines such as the Academies' are still needed for research that can't be done with federal grants, says the six-page report (not counting appendices).
A DfE source said: "It's surprising that Sir Michael thought he could produce advice on MATs based on such a skewed selection" Labour seized on Wilshaw's remarks as evidence that the government should scale back plans for all state schools in England to become academies, arguing that a pause was needed to resolve the problems.
Michael Gove said they were "accelerating the pace of reform" and the review was needed because of the growth in academies.
Up to 8,000 may be needed to meet a growth in leadership roles at academy trusts, while there is also a need for 2,000-3,000 more in the current school system.
Two new candidates were needed to be brought up to speed and the academy opened its online competition again.
If a new school is needed, academy/free school bids must be prioritised before any other school can be considered, the secretary of state will decide who runs it, local authorities are frozen out and new maintained schools will be almost impossible to achieve.
So he is rejecting the idea of thousands of schools working alone, preferring a rejuvenation in counties or regions of ambitious and inspiring political and headteacher leaders: "Academies are here to stay, but we need something like the Cleggs of West Yorkshire rather than the Cleggs of the modern era".
Academies are turning away children with special needs in order to "cherry-pick" pupils who are likely to get the best results, the head of a leading charity has warned.
