sentences:  New offices, a cafeteria (with a stage), and a kindergarten building (now the media center) were built in 1956.With the postwar building boom, more schools were built in San Bruno.The district's third school, El Crystal, was built on a small hill overlooking San Bruno City Park in 1948; it had additional classrooms added during the 1956–57 school year, when some students attending New Edgemont were bused to the school to relieve overcrowding at New Edgemont.