Crystal Lake South High School
1200 South McHenry Avenue
Prior to 1978, one high school, Crystal Lake Community High School, housed all students in Crystal Lake and was constructed in 1927. With increasing population, however, residents passed a referendum to build Crystal Lake South which opened in the fall of 1978, with the first graduating class of 1979.
In 2002, enrollment was approaching 1600, so construction began on a new addition to add classrooms by connecting two of the spokes. Also, remodeling projects widened the halls, moved nearly all the faculty into a large faculty office, and centralized the computer labs. This addition also added a lower level, which will open in fall of 2006. There are currently 1900 students and 125 staff members at Crystal Lake South High School