One class period each week is set aside for an all-school assembly, generally Wednesday mornings at 9:10 unless otherwise noted. Performances are either in-house (by students) or by groups from outside the school. Groups from the outside are selected by a parent volunteer, approved by the administration, and funded by the The Country School Parents' Association. They range in content from musical and theatrical performances to scientific and environmental presentations to purely entertaining shows.
In-house performances include a play, skit, or performance by each grade sometime during the year. Other assemblies include Fall and Spring talent shows, and three athletic assemblies at which awards are distributed for the most recent sports season. In addition, prior to each week's assembly, classes take turns presenting a poem or song.
Parents are welcome to attend all assemblies and are encouraged to make note of the dates their child/ren will be involved in a presentation.