Enrollment
774
Colorado · 2024-25 NCES data
Other / mixed grade configuration · Lakewood, CO
Addenbrooke Classical Grammar School
Federal NCES profile for Addenbrooke Classical Grammar School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 44/100.
2024-25 NCES dataOther / mixed grade configurationNCES 080480006643Charter school
👥 S:T ratio 24
🌟 Gifted program 70
📋 Attendance 37
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Addenbrooke Classical Grammar School earns 44/100 on the Resource Investment Index, with class sizes larger than 79% of Colorado schools.
- #6 of 22
- schools in Lakewood · Resource Index
- 44
- Resource Index · Typical
- 18.9:1
- large classes for Colorado
- 774
- students enrolled
Addenbrooke Classical Grammar School has class sizes larger than 79% of Colorado schools. Computed live against every Colorado school reporting to NCES.
By Resource Investment Index, Addenbrooke Classical Grammar School ranks #6 of 22 schools in Lakewood, CO.
School address
District: Jefferson County School District No. R-1 · Colorado
NCES ID 080480006643 Verify on NCES CCD record →
Teachers (FTE)
41.0
Federal CCD staff survey
Students per teacher
18.9:1
vs 16.6:1 Colorado avg
+14% vs state
Student-teacher ratio in context
How Addenbrooke Classical Grammar School compares with Colorado and U.S. medians
What stands out at Addenbrooke Classical Grammar School
Addenbrooke Classical Grammar School is a large charter combined-grade school in Lakewood, Colorado, enrolling 774 students.
Class loads run somewhat heavier than typical: 18.9:1 puts it in the larger third of Colorado schools by student-teacher ratio.
Enrollment of 774 puts it in the larger third of Colorado schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,922 scored Colorado schools.
Its student body is led by White (62%) and Hispanic or Latino (30%) (diversity index 53/100).
Chronic absenteeism is elevated: 25.3% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Jefferson County School District No. R-1 also operates Arvada West High School (1,923 students) and Ralston Valley Senior High School (1,875 students) alongside Addenbrooke Classical Grammar School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Addenbrooke Classical Grammar School compares
Addenbrooke Classical Grammar School on the metrics families compare, against Colorado and U.S. means.
| Metric | This school | vs Colorado | Colorado avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.9:1 | ▲ 14% | 16.6:1 | 15.7:1 |
| Enrollment | 774 | top 12% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
18.9:1
Leaner classes than 20% of US schools, heavier class loads than most.
774
Bigger than 84% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
18.9:1
students per teacher
- 14% above state mean
Top 79% in Colorado - lower ratio than 21% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
25.3%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$13,124
per pupil, district-wide
- below Colorado avg of $16,273
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.1 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
4
in-school suspensions + 10 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 1.8 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 61.6%
Hispanic or Latino 30.4%
Asian 3.5%
Two or More 3.0%
African American 1.3%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 61.6% of enrollment.
Student-body diversity index 52.6/100
Simpson diversity index - at 52.6, Addenbrooke Classical Grammar School is more mixed than the Colorado school average of 47.1.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Jefferson County School District No. R-1, which includes Addenbrooke Classical Grammar School.
$13,124
Per student
-19%
vs Colorado
Avg $16,273
-21%
vs U.S.
Avg $16,593
Revenue mix
Local 55.3%
State 36.9%
Federal 7.8%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Addenbrooke Classical Grammar School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Arvada West High School | Larger | No free-lunch data | Higher S:T ratio |
| Ralston Valley Senior High School | Larger | No free-lunch data | Higher S:T ratio |
| Chatfield High School | Larger | No free-lunch data | Similar S:T ratio |
| Lakewood High School | Larger | No free-lunch data | Lower S:T ratio |
| Columbine High School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Addenbrooke Classical Grammar School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,923
- Students per teacher
- 21.4:1
- Resource Index
- 32/100
- Enrollment
- 1,875
- Students per teacher
- 21.6:1
- Resource Index
- 35/100
- Enrollment
- 1,808
- Students per teacher
- 20.1:1
- Resource Index
- 34/100
- Enrollment
- 1,735
- Students per teacher
- 17.4:1
- Resource Index
- 52/100
- Enrollment
- 1,710
- Students per teacher
- 19.9:1
- Resource Index
- 31/100
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Colorado, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~774 students)
Next steps
Verify locally before acting on Addenbrooke Classical Grammar School's federal record.
- Compare Addenbrooke Classical Grammar School against another school. Compare schools
- Jefferson County School District No. R-1's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Addenbrooke Classical Grammar School
How many students attend Addenbrooke Classical Grammar School?
Addenbrooke Classical Grammar School has 774 students enrolled. It is a public school in Lakewood, CO.
What is the student-teacher ratio at Addenbrooke Classical Grammar School?
The student-teacher ratio at Addenbrooke Classical Grammar School is 18.9:1, which is 14% higher than the Colorado average of 16.6:1 and 20% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Addenbrooke Classical Grammar School?
The largest demographic group at Addenbrooke Classical Grammar School is White at 61.6% of enrollment, in Lakewood, CO. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 52.6/100.
What is the Resource Investment Index for Addenbrooke Classical Grammar School?
Addenbrooke Classical Grammar School has a Resource Investment Index of 44/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Addenbrooke Classical Grammar School rank among schools in Lakewood?
By Resource Investment Index, Addenbrooke Classical Grammar School ranks #6 of 22 schools in Lakewood, CO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Lakewood on the city page.
Is Addenbrooke Classical Grammar School a good school?
Addenbrooke Classical Grammar School earns 44/100 on the Resource Investment Index, with class sizes larger than 79% of Colorado schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Jefferson County School District No. R-1?
Besides Addenbrooke Classical Grammar School, Jefferson County School District No. R-1 also operates Arvada West High School (1,923 students), Ralston Valley Senior High School (1,875 students), and Chatfield High School (1,808 students). See the Jefferson County School District No. R-1 district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.