- Calne Secondary Modern School (Wilts)
- Caludon Castle Comprehensive (Coventry)
- Canon Slade Grammar (Bolton, Lancs.)
- Canton High School for Girls (Cardiff)
- Cardigan County Grammar School (Wales)
- Carrickfergus Technical School (Co. Antrim)
- Castle Douglas Primary School (Kirkcudbrightshire)
- Castle End High School (Kenilworth)
- Castle Junior Girls' School (Knaresborough)
- Castle Junior Girls' School (Knaresborough) geograph-6769774-by-habiloid
- Cathays High School for Girls (Cardiff)
- Cavendish Secondary Modern School (Birkenhead)
- Cedars Junior Mixed School (Harrow)
- Central County Modern School (Girls') Scarborough
- Central County Modern School (Scarborough)
- Central School Scarborogh
- Chace Girls' Secondary Modern School (Enfield)
- Chantry Mount Girls' School (Herts.)
- Charterhouse
- Charterhouse
- Chell County Secondary Modern School (Tunstall)
- Chelmsford Secondary Modern Girls' School (Grimsby)
- Cheltenham
- Chippenham County Secondary Modern School (Wiltshire)
- Christ Church School (Croydon)
- Christ's Hospital
- Christ's Hospital
- Christchurch Secondary Modern School for Girls (Chatham)
- Christian Brothers' High School, Lewisham, AU
- Christopher Hatton Primary School (London)
- Church Street School (Wallasey)
- Churchfields School (Walsall)
- Churchill Secondary Modern School (Banwell)
- CIty of London
- Clare Park Secondary School (East Malling)
- Claremont Junior School (Blackpool)
- Claremont School (Nottingham)
- Claremont Secondary School for Girls (Manchester)
- Clarkston Public School (Airdrie)
- Clemence Cave Secondary Modern School (London)
- Cliff Lane Primary School (Ipswich)
- Clondermott Secondary Intermediate School (Londonderry)
- Clydebank High Secondary School (Dunbartonshire)
- Colden Common C.of E. Primary School (Hants.)
- Coldstream Junior Secondary School (Berwickshire)
- Coleraine Park Junior Mixed School (London)
- Colston's Primary School (Bristol)
- Commercial Road School (Sunderland)
- Congleton Girls' School (Cheshire)
- Connaught Road Secondary Modern School (Bristol)