Charles River School (CRS) is an independent day school in Dover, Massachusetts. CRS currently serves approximately 190 students in grades PreK-8. The campus is located in the center of Dover, and consists of four buildings surrounding a central playground. CRS is a multi-age and family-like community that celebrates the joy of childhood. The school encourages the freedom to explore through in-depth projects and a strong connection to the outdoors.

After working with the CRS community to develop a master plan that provides a long term vision, ensures a whole that is greater than the sum of its parts, establishes an overall scope, and is flexible and dynamic, Flansburgh was retained by the school to design its new Middle School building. The design for the Middle School building aims at providing a facility that supports the project-based and student-centered teaching at the heart of the school's curricular program.