Left Behind Act. According to 2019 statistics, Glenbrook South was ranked 17th in terms of the best public high schools in the state of Illinois. Of the roughly 3000 students who attend GBS, roughly 42% are from minority groups. Students represent these categories: 2.4% African American, 11.3% Hispanic, 0.1% American Indian, 18.1% Asian, 65.2% white, 22.1% financially disadvantaged students. Students have a State Test Performance Index of 97.9 and a Poverty-Adjustment Performance Index of 1.55. The Disadvantaged Students' State Test Proficiency Rate is 38.3 with a Disadvantaged Students Performance Gap of 11.0, while the Non-disadvantaged Students' State Test Proficiency Rate is 71.6 and Current State Test Achievement Gap is 33.3. In College-Ready Student Performance, the College Readiness Index is 43.5, participation rate is 46.8%, Quality Adjusted Participation rate is 42.4%, Participant Passing Rate is 90.6%, and Exam Passing rate is 92.0%. Advanced Placement student performance is reflected in an AP Participation Rate of 46.8%, a Quality Adjusted Participation rate of 42.4%, a Participant Passing Rate of 90.6%, and Exam Passing rate of 92.0%. The Federal No Child Left Behind Act as applied in Illinois requires 100% of students to meet standards on the Prairie State Achievement Exam by 2013. Glenbrook South High School continues to focus curricular efforts on academic growth for each student. These efforts focus on the meaningful implementation of the [College Readiness Standards] http://www.act.org/standard/ from ACT. Student life Athletics Glenbrook South is a member of the Central Suburban League. GBS is also a member of the Illinois High School Association (IHSA), the organization that sponsors most sports and activities in Illinois. GBS sponsors interscholastic teams for young men and women in basketball, cross country, golf, gymnastics, soccer, swimming, fencing, diving, tennis, track & field, volleyball, and water polo. Men may compete in baseball, football, and wrestling. Women may compete in badminton, softball, poms and cheerleading. While not sponsored by the IHSA, the school also sponsors teams for men and women in lacrosse, in addition to a women's field hockey team. The following teams have won state championships: Basketball (girls): 1993–94 Golf (boys): 1967–68 Volleyball (boys): 2002–03 Lacrosse (boys): 1999–2000 (Indiana High School Lacrosse Association) Activities GBS sponsors a number of activities for students ranging from cultural and artistic to academic and social welfare. The list changes from year to year depending on student interest, though the current list can be found here. Among the more nationally recognizable