centre (known as the HelpDesk). The top floor ("third flat") is home to mathematics classes and the school's finance and administration offices. Finally, the basement level of School House includes The Learning Centre, the school archives, sewing room, and a campus co-op store named Hank's. Second Century Building The Second Century Building ("2CB") is home to the school's science, music, and performing arts facilities. For each of the core science subjects (biology, chemistry, and physics), there is a classroom used for lectures with an accompanying lab room for applied lessons and experiments. There is a robotics lab, a design workshop, a studio art classroom, and various music rooms equipped with sound-proof walls. Finally, the Second Century Building is home to the Mandeville Theatre, which serves as the school's primary venue for musical, drama, and speaker events. Memorial Chapel The Memorial Chapel was built during the 1920s, dedicated to the memory of Old Ridleians who died in World War I; The honour roll is engraved on two marble plaques. The chapel was enlarged during the 1960s. Each stained glass window is unique, bearing such non-traditional imagery as Ridley football helmets, but also more conventional Christian imagery. The chapel is equipped with a sound system, a new Yamaha grand piano and 2 pipe organs. The Ridley Pipe Organ is a Casavant Freres Opus 1099. It had a second manual keyboard added later in its life. The pipes for this added organ are located at the back of the chapel, while the original four sets (great, choir, swell, and pedal) are at the front. The Lower School chapel service includes at least one musical performance each Friday. The Houses of Ridley College There are currently 10 boarding houses at Ridley College, 5 boys' houses, 4 girls' houses, and 1 lower school house. Each house has a Head of House, Assistant Head of House, and Residence Don who help manage the house and act as guardians for the students in their care. Along with the staff, there are also student leaders in each of the houses. The two positions of leadership in the boarding houses are the House Captains and the Grade Representatives. House captains are all in their final year of High School. The 5 boys' houses are: Arthur Bishop West, Arthur Bishop East, Merritt North, Merritt South and Deans House. The 4 girls' houses are: Mandeville, Leonard, Gooderham East and Gooderham West.