The Margaret McMillan House, Wrotham, Kent, conceived as a memorial to the educational pioneer Margaret McMillan (1860-1931), was not a strictly educational site, having been built in 1935-1936 to provide a holiday home for children from the Nursery at Deptford, established in 1914 by McMillan and her sister Rachel McMillan, and the associated Camp School; the complex was also intended to serve as a residential training college for nursery teachers, gaining experience with the children. The institution was designed and run on the ‘open-air’ educational principles the McMillans had embraced. The site is therefore an interesting and unusual one, with each of its functions demanding careful consideration both separately and in combination. The buildings at Margaret McMillan House survive well enough to illustrate their original purpose, but there have been some significant alterations.