The Student Activities Committee (SAC), which is composed of student leaders from each form and a group of faculty, plans weekend activities for the entire School. Each weekend, SAC offers trips to cultural events in nearby Wilmington and Philadelphia. Activities are also planned on campus, and include film series on the full-size screen in Engelhard Hall, knitting lessons, ceramics workshops, cooking classes or parties at faculty homes and dances in the Edith Pell Student Center or outside on McKinstry Garth. Because food is always an essential part of any weekend, SAC organizes events such as international dinners featuring foods prepared in the dining hall by faculty and students from various cultural backgrounds.

When sports teams have major games off campus on weekends, students often organize transportation so that schoolmates can support each other at key matches. SAC organizes trips to regional professional sporting events as well. The School also has season tickets to the Philadelphia Orchestra. Students may visit museums and attend lectures and concerts at universities in Philadelphia, Washington and Baltimore each weekend. When the weather is nice, relaxing on the front lawn, the T-dock and on Noxontown Pond is a favorite weekend activity.