Complex sentence: The Rand School went into decline as a result of the G.I. Bill following World War II (because young workers had a new way to finance their education), and in 1956 Camp Tamiment, a socialist summer camp, purchased the School.
Split into simpler sentences: The Rand School went into decline as a result of the G.I. Bill following World War II (because young workers had a new way to finance their education). In 1956, Camp Tamiment, a socialist summer camp, purchased the School.