Complex sentence: Freshmen and sophomores attend class at South campus, located at 4900 S. Willow Springs Rd. in Western Springs, while juniors and seniors attend class at North campus, located at 100 S. Brainard Ave. in La Grange, which also houses the district offices.
Split into simpler sentences: Freshmen and sophomores attend class at South campus, located at 4900 S. Willow Springs Rd. in Western Springs. Juniors and seniors attend class at North campus, located at 100 S. Brainard Ave. in La Grange, which also houses the district offices.