1913 - The first PTO and first Kindergarten
The first parent-teacher organization held meetings in 1913 and the first official kindergarten class was offered in 1916. Eventually the need for high school classes diminished and by the 1920s PMFS once again became an elementary school.
1938 - The Annie H. Wilson Room
In 1938 the Meeting granted the school the use of north end of Meetinghouse as classroom space. Eventually the need for more space, both for the Meeting and the school, brought about the addition of the Annie H. Wilson Room. Built as an addition to the Meetinghouse in 1945, it was used as the social room for the Monthly Meeting and was the location for work in aid of the American Friends Service Committee, as well as serving as the kindergarten classroom and lunchroom for the school.