Glenbrook South High School, or GBS, is a public four-year high school located in Glenview, Illinois, a north suburb of Chicago, in the United States. It is part of Northfield Township High School District, which also includes Glenbrook North High School. Feeder schools that attend GBS are Attea, Springman, Field (Glenview portions), and Maple (Glenview portions). According to state standardized test scores, 29% of students are at least proficient in math and 40% in reading, as tested by the Illinois State Board of Education. These figures indicate that the schools performance is above the state high school median of 24% proficiency in Math and Reading. History In 1962, due to overcrowding at Glenbrook North, Glenbrook South High School was established. It underwent a dramatic expansion in 2002 adding dozens of classrooms, revamping the music and performing art facilities, and reconfiguring the parking lots and athletics fields. During the summer of 2007, Glenbrook South updated six science classrooms from the 1960s and reconfigured two others to create full-size science classrooms. The Dean's Office, and Student Activities Office were also renovated. A new Food Court was constructed along with a Student Activities Center that was created by reconfiguring the faculty lounge. Construction at GBS was completed with the addition of a practice gym, which increased PE capacity and a new pool with handicapped access, eight lane capacity and a diving depth of fourteen feet. A new fitness center opened in May 2008 and the former weight room was converted into two health classrooms, a driver education classroom and a Health/Driver Education office. The fieldhouse floor was installed in 2011, along with the school bathrooms renovation. In 2017, A new gym floor was installed replacing the old one. In 2019, GBS renovated several classrooms and replaced the fire alarm system (This process was completed in 2021). Today, Glenbrook South High School, along with Glenbrook North, are noted for their outstanding curriculum and quality of education, having been repeatedly named to a variety of best-in-the-nation lists. For example, as part of the First in the World Consortium, GBS and GBN students scored first in the world in international math & science testing. Academics In 2008, Glenbrook South had an average composite ACT score of 24.3, and graduated 99.6% of its senior class. Glenbrook South did not make Adequate Yearly Progress on the Prairie State Achievement Examination, a state test part of the No Child