John Constable is an experienced education consultant currently serving as a Leading Edge Consultant with SSAT since 2025 and continuing to support school improvement as an educational consultant. Previously, they held several leadership roles, including Headteacher at Langley Grammar School and Deputy Headteacher at Wycombe High School. Their teaching career began as a Teacher of Physics at Aylesbury Grammar School, and they advanced through positions such as Head of Physics at Watford Grammar School for Boys and Assistant Headteacher at Sir William Borlase's Grammar School. John holds multiple qualifications, including an NPQH from the National College of School Leadership and an NPQEL from UCL Institute of Education.
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