An addition was put on in the 1930s, followed by the gymnasium in 1955 and the lower school building.

[3] The JEM (Joint Environmental Mission) program started in 1991.

The exchange includes schools in St. Petersburg, Russia; Belgaum, India; Honolulu, Hawaii; Ngong Hills, Kenya; Melbourne, Australia; Nanchang, China; Montmorillon, France; and Rio Blanco, Amazon Rainforest, Ecuador.

Every 4–5 years a gathering of all JEM partner schools occurs to discuss one of the five environmental themes: Water, Soil, Light, Air, and peace.

The last "Earth Summit" was held at Buckingham Friends School in April, 2013.