Teesside the four independent unitary authority boroughs of Hartlepool, Stockton, Middlesbrough and Redcar and Cleveland (a renamed Langbaurgh). At this time they were returned to the counties of North Yorkshire and County Durham for ceremonial purposes, with Stockton-on-Tees becoming the only district in England split between two ceremonial counties. In 1998 the neighbouring Borough of Darlington also became an independent unitary authority and this along with the four former Cleveland boroughs form the sub-region of the Tees Valley which is used for statistical purposes and governmental organisation. The name Tees Valley is increasingly promoted for economic and cultural connections, though Teesside,
Teesside High School become fully co-educational. Children can start the school’s Little Diamonds Nursery at the start of the term in which they turn three years old, attending on a full-time or part-time basis. The school is a registered provider of the Early Years Provision for three and four year olds and accepts all employer nursery voucher schemes. Teesside High School Sixth Form is a provider of post-16 education. The school unveiled its new Sixth Form block in May 2014. Teesside High School was named in the Top Ten North East Independent Schools by The Sunday Times in 2015. The school achieved 100%