Castle Hills Secondary Modern school opened on Tuesday 6 January 1958 for 276 children, but had capacity for 480.

[6][7][8] The headteacher was Mr Roland Mark Underhill, who lived on Dorton Avenue, with two daughters.

He attended King Edward VI Five Ways School and the University of Birmingham, gaining an Education diploma in 1933.

[11][12] Peter Elliott would be head of the Castle Hills Community School for the rest of the 1990s.

It would be called Middlefield Lane Secondary School,[15] which opened on Tuesday 4 January 1966, with 475 children.

The school construction cost £211,000, and was opened by William Alexander, Baron Alexander of Potterhill, general secretary of the Association of Education Committees, with his wife, with around 500 guests, with the chairmen of Lindsey County Council and Lindsey Education Committee.

[21] Harry Johnson took over as headmaster in April 1977; he originated from Darlington, with a degree in Zoology from Newcastle University.

[22] In 1984, Mr Johnson described the eleven-plus exam as a 'barbarity' that 'created distinctions between children which lasted them throughout life'.

[29][30] From 1 December 1997 the acting headmaster was Barry Tointon, of the Caistor Yarborough School.

The two predecessor sites are now closed, and a new purpose-built facility has been built on Corringham Road, Gainsborough.

In 2014 it was announced that following serious concerns being raised by Ofsted inspectors about its performance, the school would be put under a new sponsor.