It was considered the best school in Mexico for several years mainly due to its high level of English.
Around 1904-1905, the school moved to its current location, to what used to be the summer house of José Yves Limantour the Finance Minister of President Porfirio Díaz.
This summer house is built in Victorian British style, emulating a small castle in the Scottish Highlands.
Mr. Williams was by that time an influential person in the educational board, established by Justo Sierra.
As a solution of the reduction of the original school area, he established 2 more campuses: one with a new elementary school and the kindergarten in the southern part of the city in San Jeronimo in the Magdalena Contreras borough, and a didactic farm and sporting grounds in the Tlalpan borough, near Mount Ajusco.