This series focusses on the headmastership of John David Buchanan (1958-1977) and contains items relating to the life at School in the 1960s and 1970s, its staff and pupils. The bulk of the series consists of books, publications, letters, speeches and sermons written by Mr Buchanan himself.

This is focussing on Oakham School Enterprises LTD, since its creation. This file is chiefly made of legal documents and letters.

This sub-series relates to the history of Old School, oldest building of Oakham School, in Cutts Close park. It is made of a collection of photographs and art work; of newspaper cuttings and letters, mostly relating to the debate concerning the refurbishment of the building and preserving the frescoes painted by Mary Sargant Florence.

This series focusses on the headmastership of Oliver Richard Sylvester Bull (1977-1984) and contains items relating to the life at School in the 1970s and 1980s, its staff and pupils. One of the files relates to Michael Stevens as Acting Headmaster for two terms in 1985.

A collection of letters relating to OSEL courses, Activity Holidays and events in the 1980s.

This sub-series relates to the history of the Cadets at Oakham School since 1910. The bulk of the collection is made of photographs of inspection throughout the 20th century.

This file focuses on correspondence asking/ giving John Barber permission to use certain material in his book.

This series focusses on the headmastership of Rev Edward Vere Hodge (1879-1902) and contains items relating to the life at School in the late19th century, its staff and pupils. The series contains some of the earliest photographs of Oakham School's collection.

This collection focuses on the staff who have worked for Oakham School over the years. Material focuses on not only training and teaching, but staff wellbeing, pay and benefits.

There are two series which focus on notable members of staff from the school's history: Jon Wills and Brian Welford. Material for these staff members have been collected by themselves and other members of staff.

Recruitment series includes jobs descriptions for various positions, both teaching and support staff, in the school.

There is a strong collection of policies an guidance for teachers in completing the many administrative and teaching jobs expected.

This series focuses on the boarding boys in Deanscroft, since its opening in 1948. The Headmaster himself was Housemaster, until 1971. Deanscroft boarding house was closed on Speech Day 1989, prior to its conversion into Stevens, a boarding house for girls. The boarding boys were moved to the newly built Haywoods House on Kilburn Road. The items include the complete set of house photographs and informal photographs showing boys around the house and on campus, as well as duty records.