Papers collated by George Barker Jeffrey whilst Director of the Institute of Education, including papers relating to the administration of the ATO (Area Training Organisation) including minutes of Institute committees such as the Council, Committee of Principals, and the Conference of LEAs, correspondence with the student union, and files regarding collegiate visitations; files relating to individual departments of the Central Institute; papers relating to external committees including the Inter-departmental Sub-Committee on Social and Economic Research, 1947-1949, the Secondary Schools Examination Council, 1947-1955, King George's Jubilee Trust, and the University of Cambridge Local Examinations Syndicate; correspondence with the Ministry of Education; correspondence and committee papers relating to the University of London; papers relating to the establishment of the Music Teacher's Certificate, 1954-1956, and to the introduction of a three-year course of teacher training, 1955-1959; research papers including raw data and statistical analysis of class sizes, c 1950s; returns to the Ministry of Education on the employment of graduate teachers, 1950-1961; lecture notes and scripts of radio broadcasts; letters of condolence and tributes on death, including papers concerning a memorial fund and memorial bust; papers relating to the West African Examinations Council, 1950s-1960s.