The school offered both GCSE and Advanced Level qualifications for male and female students.

It opened in the convent parlour of Quarry Brook House, former home of Meccano inventor and Conservative MP Frank Hornby, with only 16 eleven-year-old girls.

Due to the interest taken in it by the Bootle Education Committee, it rapidly grew in building size and pupil numbers, and became a voluntary aided Grammar School.

The Sixth Form at Maricourt was rated as gaining some of the highest Advanced Level results in Merseyside and stand consistently above the national average,[1] as well as enjoying a regular 100% pass rate for Advanced Level students.

Facilities at Maricourt, based in Quarry Brook House, were subject to substantial refurbishment during the 2011 August Holidays with modified study areas as well as the conversion of one of Quarry Brook's larger first floor rooms into an Oratory for use by students.