Comm H S Dist 99 - South High Sch

Downers Grove · IL · CHSD 99 · Public

Public CHSD 99 →

AP rigor: 90th percentile nationally 19 AP courses

At a glance

Programs & features
  • 19 AP courses offered — Elite
  • Dual-enrollment program (college credit while in HS)
  • 4 calculus classes · 23 physics · 24 chemistry
Academic signals
  • AP rigor: 90th percentile nationally
  • SAT/ACT participation: Top 0.4% by test-taker volume

Composed from federal CRDC offerings, and other public data. Full breakdowns below.

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How Comm H S Dist 99 - South High Sch compares for families

Standout academic depth by national standards.

  • StatewideAP rigor in the top 10% nationally with 19 AP courses.
  • LocallyIL sits right at the US average on NAEP 8th-grade math — local school quality will set your kid apart.
  • vs Similar SchoolsThe closest comparables nearby: Hinsdale Central High School, Naperville Central High School, Comm H S Dist 99 - North H S and 5 more. See the sidebar to compare side-by-side.

For Parents

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Academic rigor

AP + advanced-course offerings

Elite — exceptional AP + advanced course breadth

90th percentile nationally

50th 90th ↑ this school
Less rigorMore rigorMost rigor
AP courses offered
19
Math ✓ · Science ✓
Students taking AP courses
365
≈14 per 100 students · uptake, not just offerings
Advanced math classes
26
4 calculus · 22 advanced
Lab science classes
47
23 physics · 24 chemistry
Other rigor signals
Dual-enrollment program

Source: federal Civil Rights Data Collection (CRDC 2020-21). CRDC reports what's offered + enrolled — it doesn't collect AP exam pass rates (College Board owns that data and doesn't release it school-level).

SAT / ACT participation

CRDC federal data · 2020-21

Top 0.4% by test-taker volume

50th 90th
SAT/ACT test-takers
1,258
11th-12th graders who took 1+ college admissions test
Test-taking intensity
48.6
takers per 100 students in grades 9-12
Compared against
18,426
US high schools reporting SAT/ACT participation

Source: federal Civil Rights Data Collection (CRDC 2020-21). Volume — not score — is what's reported here. A higher count means more students at this school are entering the college admissions pipeline. Note: 2020-21 was COVID-disrupted; some districts (especially those that stayed remote longer) report unusually low or zero takers.

Teacher workforce · federal CRDC

Teacher experience & reliability

% inexperienced teachers (1st-2nd yr)
14.4%
Typical mix. Watch the trend — high turnover can compound.
% chronic teacher absence (≥10 days/yr)
28.3%
Elevated. Teacher absence directly affects classroom continuity and student outcomes.

Source: federal Civil Rights Data Collection (CRDC 2017-18 — the most recent vintage that publishes per-school teacher quality fields; the 2020-21 sweep had them suppressed). "Inexperienced" = teachers in their first or second year. "Chronic absence" = teachers absent 10+ days/year.

Your state's public flagship

University of Illinois Urbana-Champaign

44%
admit rate
$16,004
in-state tuition/yr · $35,124 out-of-state
1270–1510
SAT 25–75 · ACT 29–34

The in-state tuition gap is the flagship's biggest draw — most in-state families pay far less than the out-of-state sticker. Average net price after aid runs about $14,355/yr. Admission odds depend on your student's GPA and test scores, not which high school they attend.

See the full University of Illinois Urbana-Champaign profile → Estimate your odds with your scores →

Source: IPEDS admissions, tuition & enrollment + College Scorecard net price. Flagship = the state's primary public research university.

Chronic absenteeism

Share of students absent 15+ days
19.4%
Roughly average. The national post-COVID rate climbed to ~16% nationwide; this school is in the middle of the pack.
Students absent 15+ days
529
Federal definition: absent (excused or unexcused) for at least 15 of ~180 school days — about 10% of the school year.

Why this matters to enrollment: Chronic absence is the strongest early indicator of dropout, transfer-out, and family disengagement. A school's absenteeism trend forecasts its enrollment trend 1-3 years out.

Source: U.S. Department of Education, Civil Rights Data Collection 2020–2021. Rate = students chronically absent ÷ 2021 total enrollment.

Counselor capacity

Student : Counselor
236:1
Below the ASCA 250:1 recommendation — strong capacity for college planning, course selection, and student supports.
Counselor FTE
11.0
Full-time-equivalent school counselors on staff.
Teacher FTE
182
Full-time-equivalent classroom teachers.

Source: U.S. Department of Education, Civil Rights Data Collection 2020-2021. Counselor ratio = the school's most recent total enrollment ÷ counselor FTE. The American School Counselor Association (ASCA) recommends a 250:1 maximum; the US national median across schools with on-staff counselors is roughly 430:1.

Enrollment trend & projection

Grade 12 went from 721 in 2021 to 649 in 2024 — over 3 years.
-10.0%

Total enrollment + grade 12, NCES Common Core of Data (2021–2024).

If the recent trend holds…

At its recent rate of -1.7%/year, projecting from 2024's 2,591 students:

2025
2,548
2027
2,463
2029
2,382

≈ 209 fewer students by 2029 — a real revenue/relevance risk worth getting ahead of.

An extrapolation of the recent trajectory, not a forecast of the school's plans; ignores one-off shocks.

Revenue at risk

At $26,214 per student in district revenue, the 209 students projected to be lost by 2029 represent ≈ $5,478,726/year in funding at risk.

District total revenue ÷ enrollment, NCES F-33. Public funding largely follows enrollment, so a shrinking class is a recurring budget hit.

Most similar nearby high schools

The schools most like this one — same type, blended on distance and size — and where their enrollment is heading. These are the schools families here weigh against each other.

SchoolTypeMilesHS enrollmentTrend
Hinsdale Central High School
Hinsdale
Public 4.6 2,445 -3.9%
Naperville Central High School
Naperville
Public 7.0 2,589 -0.9%
Comm H S Dist 99 - North H S
Downers Grove
Public 2.4 2,082 -3.5%
Naperville North High School
Naperville
Public 7.1 2,467 -7.2%
Glenbard East High School
Lombard
Public 6.6 2,311 +0.4%
York Comm High School
Elmhurst
Public 9.1 2,590 -6.7%
Glenbard West High School
Glen Ellyn
Public 7.8 2,330 +0.4%
Bolingbrook High School
Bolingbrook
Public 6.7 3,298 -2.5%

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