As at 31 August 2010, based on the old Ofsted methodology, 80,610 pupils attended academy sponsor-led schools, and 7,253,750 pupils attended local authority maintained schools.
As at 31 December 2017, based on the old Ofsted methodology1, 694,329 pupils attended academy sponsor-led schools, and 4,218,520 pupils attended local authority maintained schools.
 Following a consultation, new Ofsted methodology contains some changes to the way in which they report on schools’ most recent inspection grades. The data includes the most recent inspection grades for an inspection of an earlier version of the same school (inspected under a different unique reference number (URN)) for schools yet to be inspected under their current URN. See: http://www.gov.uk/government/consultations/changes-to-ofsteds-statistical-reporting-of-inspection-outcomes-for-maintained-schools-and-academies for the consultation and an analysis of the responses.