Marlborough College is a British co-educational independent school for day and boarding pupils, located in Marlborough, Wiltshire. Founded in 1843 for the education of the sons of Church of England clergy, the school now accepts both boys and girls of all beliefs. Currently there are just over 800 pupils, approximately one third of whom are female. New pupils are admitted at the ages of 13+ ("Shell entry") and 16 (Lower Sixth). Marlborough was, in 1968, the first major British independent school to allow girls into the sixth form, setting a trend that many other schools would follow. The College became fully co-educational in 1989. The College has also been pioneering in other fields, making a major contribution to the School Mathematics Project (from 1961) and initiating the teaching of Business Studies at A level (from 1968). Fagging was officially abolished in the 1920s, and Marlborough was one of the first public schools to do so. However, unofficial fagging did persist beyond this change for some time. In 1963 a group of boys, led by the future political biographer Ben Pimlott, wrote a book, "Marlborough, an open examination written by the boys," describing life at the school.