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Chelmsford High

North Chelmsford · MA · Chelmsford · Public

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📚AP rigor: 82th percentile nationally 📖10 AP courses 🎓99% 4-yr grad rate

📋 At a glance

Programs & features
  • 📚 10 AP courses offered — Elite
  • ✅ Dual-enrollment program (college credit while in HS)
  • 🔢 12 calculus classes · 23 physics · 19 chemistry
Academic signals
  • 🎓 AP rigor: 82th percentile nationally
  • 🎓 4-yr grad rate: 99% (Top 0.7% of US high schools by 4-yr grad rate)

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

💡

How Chelmsford High compares for families

Stronger-than-average college-prep profile.

  • StatewideAP rigor in the top 18% nationally with 10 AP courses.
  • LocallyMA students outperform the US average on NAEP 8th-grade math (+14 points).
  • vs Similar SchoolsThe closest comparables nearby: Collegiate Charter School of Lowell, Lighthouse School, Inc, Gr Lowell Regional Vocational Technical and 5 more. See the sidebar to compare side-by-side.

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🎓 Academic rigor

AP + advanced-course offerings

Elite — exceptional AP + advanced course breadth

82th percentile nationally

50th 90th ↑ this school
Less rigorMore rigorMost rigor
AP courses offered
10
Math ✓ · Science ✓
Advanced math classes
43
12 calculus · 31 advanced
Lab science classes
42
23 physics · 19 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
SAT/ACT test-takers
0
11th-12th graders who took 1+ college admissions test
Test-taking intensity
0.0
takers per 100 students in grades 9-12

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.

🎓 4-year graduation rate · federal EDFacts

What % of students graduate on time?

Top 0.7% of US high schools by 4-yr grad rate

50th 90th
4-year graduation rate
99%
Range: 99–100%
4-year cohort size
358
Students in the 9th-grade entry class tracked over 4 years
Compared against
17,988
US high schools reporting 4-year ACGR

Source: federal EDFacts ACGR (Adjusted Cohort Graduation Rate), 2019 vintage via Urban Institute. EDFacts publishes a range (low-high) to preserve privacy on small cohorts; we display the midpoint.

👩‍🏫 Teacher workforce · federal CRDC

Teacher experience & reliability

% inexperienced teachers (1st-2nd yr)
7.9%
Strong: experienced corps. New teachers rotate through but most have ≥3 years in.
% chronic teacher absence (≥10 days/yr)
31.1%
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.

Chronic absenteeism

Share of students absent 15+ days
11.3%
Roughly average. The national post-COVID rate climbed to ~16% nationwide; this school is in the middle of the pack.
Students absent 15+ days
159
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. For school leaders: an Enrollment Trend Audit traces this dynamic forward →

Source: U.S. Department of Education, Civil Rights Data Collection 2020–2021. Rate = students chronically absent ÷ 2024 total enrollment.

Counselor capacity

Student : Counselor
206:1
Below the ASCA 250:1 recommendation — strong capacity for college planning, course selection, and student supports.
Counselor FTE
6.8
Full-time-equivalent school counselors on staff.
Teacher FTE
103
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 342 in 2021 to 342 in 2024 — over 3 years.
+0.0%

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

If the recent trend holds…

At its recent rate of +1.5%/year, projecting from 2024's 1,402 students:

2025
1,423
2027
1,465
2029
1,508

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

Revenue upside

At $19,884 per student in district revenue, the 106 students projected to be gained by 2029 represent ≈ $2,107,704/year in additional funding.

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

Nearby high schools — the local competition

The closest high schools families here also consider, and where their enrollment is heading.

SchoolTypeMilesHS enrollmentTrend
Collegiate Charter School of Lowell
Lowell
Public · charter 1.3 281 +79.0%
Lighthouse School, Inc
North Chelmsford
Private 1.7 184 -21.4%
Gr Lowell Regional Vocational Technical
Tyngsborough
Public 2.3 2,297 +0.7%
The Career Academy
Lowell
Public 2.8 83 -14.4%
Innovation Academy Charter School
Tyngsboro
Public · charter 3.1 366 -2.7%
Lowell High
Lowell
Public 3.7 3,434 +13.2%
Lowell Middlesex Academy Charter School
Lowell
Public · charter 3.7 126 +70.3%
Dr. Janice Adie Day School
Chelmsford
Public 3.7 14

For Parents

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