Concrete Modular Classrooms: An Attractive Solution Gilbert Architects recently installed the first reimbursable pre-cast concrete modular facilities in the Commonwealth of Pennsylvania, at B. Reed Henderson High School, West Chester Area School District. The classrooms were selected because of the potential for reimbursement, flexibility, durability, and ease of installation. The structures can be removed, adjusted and reused at other locations. This article includes project photos. Read more.