Then, they were a welcome diversion from classroom tedium; now, these educational films are an often hilarious time capsule of an ostensibly simpler time. Learn what to do in case of a nuclear attack with the classic “Duck and Cover,” hear actor Sal Mineo describe the terrors of LSD, discover the keys to safe driving with James Stewart and heed the warnings about venereal disease from the Oscar-winning director of All Quiet on the Western Front.