Although strictly Orthodox schools have had a tough time with Ofsted over the two years, some are still proving able to make the grade.
The state-aided Lubavitch Senior Girls' School in Hackney, north London, which was rated as "requiring improvement" in 2013, has now been officially classified as a good school.
Its headteacher had worked with determination to tackle weaknesses, senior leaders had "grasped the nettle of change" and additions to the curriculum "emphasised a culture of high expectations", inspectors said.
Headteacher Helen Freeman said: "Our school is a credit to our community and I am proud that we will continue to give our pupils a fantastic education."
