The district trained a large number of defense workers in the national defense program, in preparation for World War II. About 10,000 men were trained in 1941 in airplane construction, shipbuilding, and other fields. During September 1942, 4400 additional elementary students enrolled. Ten teachers were added. There was an increased number of freshmen and sophomores in the high schools, but an overall loss of 832 students due to war industries and enlistment. By 1942, there were 63,238 school-age students, with 54,655 registered, and 1,613 instructors in 76 buildings.