An all-through school and its sixth form has been rated outstanding by Ofsted.
Loxford School of Science and Technology, in Loxford Lane, Ilford, was praised by inspectors following an inspection last month.
The education watchdog said headteacher Anita Johnson was the "driving force" behind the school's success and said teaching and pupil progress were excellent.
The school, which caters for more than 2,200 pupils, was also rated outstanding in its last Ofsted report back in 2007.
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