The 1920s Sprague School, closed for 30 years, was restored and expanded to accommodate Wellesley's growing elementary school population. The overall project design is sensitive to the surrounding residential neighborhood. Roof lines and massing in the addition are scaled to match the original building, and the open space at the front of the 1920s building was redesigned to be pedestrian-friendly. A parking lot and driveway were replaced with a playground for neighborhood use. Pedestrian paths and a refurbished entrance to the old school serve neighborhood children who walk to school.

At the heart of the restored original building, HMFH has designed a library that opens up former attic space, exposing the original roof trusses above the vaulted ceiling. In a reference to the exterior clock tower directly above the circulation desk, HMFH has designed an interior clock that fills the base of the tower. The cozy library features a sunny bay window with a bench where students can curl up with a favorite book. A new cafeteria, music, and special education rooms also occupy the original building.