1931:

The Cambridge-Haskell School moves to the former 25-acre Trapelo estate in Weston, Massachusetts, and changes its name to The Cambridge School of Weston. Under Headmaster John French, the progressive, co-educational, boarding school opens with 106 students and nine teachers. The school mascot, a gryphon, is permanently embossed on the outside wall of the newly constructed classroom building (now the Kluchman Administration Building).

1931:

The Lab System is instituted. Every day begins with a two-hour laboratory period. Students choose which academic area to study and teachers in each lab stand ready to assist the students on projects of their own choosing.

1932:

Students construct the Hobby House during the school's first year in Weston. Used for years as a space for woodworking, it is now the school's Admissions and Development building.

1933:

The textbook has been replaced by primary sources. Each classroom houses a mini library of relevant research books and periodicals.

1939:

Town Meeting is introduced, underscoring the school's progressive commitment to teaching democracy. Following Robert's Rules of Order, students propose changes in school rules and regulations, write up formal warrants, present them to the entire student body for debate, and vote. This major form of student government continues today.