The school was founded in 1887, named Reading High School, replacing the privately owned Blenheim House Ladies' School. It was located at London Road (in the building which became the Gladstone Club). The Church Schools Company, instrumental in founding the school, felt that Reading, with its growing population reaching 60,000, was in need of a new school. The school aimed to provide high quality education with a Christian ethos at an affordable price. When founded, the school had an enrolment of 40 girls, which steadily increased to 120 by 1902, when Miss Helen Musson MA, the new headmistress, was appointed.