Not to be confused with Therfield School also known as Therfield First School, HertfordshireTherfield School is a mixed comprehensive school educating students aged 11–18 in Leatherhead, Surrey, England. Therfield School sixth form teaches courses of further education for students between the ages of 16 and 18 and has an arrangement of reciprocated entry criteria with three others in the county: The Ashcombe School, Warlingham School and Oxted School.