Enrollment
1,743
Idaho · 2024-25 NCES data
2024-25 NCES data High school (grades 9-12) NCES 160210000674
Centennial High School — Boise, ID
Federal NCES profile for Centennial High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 51/100.
👥 Class size 15
📚 AP courses 75
🌟 Gifted program 70
🎓 Counselors 42
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Joint School District No. 2 · Idaho
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
91.0
Federal CCD staff survey
Students per teacher
21.2:1
vs 17.3:1 Idaho avg
+23% vs state
Free-lunch eligible
16.1%
vs 29.3% Idaho avg
-45% vs state
Student-teacher ratio in context
How Centennial High School compares with Idaho and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Centennial High School reports 1,743 enrolled students to the National Center for Education Statistics (NCES) alongside 91.0 full-time-equivalent teachers, producing a 21.2:1 student-teacher ratio. That figure sits 23% above the Idaho state mean of 17.3:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 33% higher, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 16.1% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 45% below the Idaho average and 69% below the national baseline. The school offers 15 Advanced Placement courses, a stronger academic pipeline indicator than enrollment alone. Counselor coverage works out to roughly 290 students per counselor, above the ASCA-recommended ceiling of 250:1.
On the finance side, the surrounding Joint School District No. 2 spends $8,978 per pupil district-wide, below the Idaho average of $12,943 and below the national average of $19,490. Revenue comes 22.0% from local sources (property taxes), 63.9% from the state, and 14.1% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 51/100 (C-), calculated from 4 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Centennial High School compares
Cross-validating school-level NCES values against Idaho state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Idaho | Idaho avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.2:1 | ▲ 23% | 17.3:1 | 15.9:1 |
| Free-lunch eligible | 16.1% | ▼ 45% | 29.3% | 51.8% |
| Enrollment | 1,743 | top 99% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
16.1%
free-lunch eligible
— 45% below the Idaho average of 29.3%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
21.2:1
students per teacher
— 23% above state mean
Top 86% in Idaho — lower ratio than 14% of state schools
Above 20:1 — larger class loads than the typical U.S. public school; staffing is stretched relative to enrollment.
Funding equity
$8,978
per pupil, district-wide
— below Idaho avg of $12,943
Below the U.S. average per-pupil spend — funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors6.0 FTE
Per 290 students — the combined health-and-guidance staffing load for this school.
Discipline context
107
in-school suspensions + 38 out-of-school
Suspension rate: 6.1 per 100 students. Combined in-school and out-of-school rate: 8.3 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 1,743 Top 99% in Idaho — larger than 1% of 778 state schools
Teachers (FTE) 91.0
Students per teacher 21.2:1 +23% vs state
Free-lunch eligible 16.1% -45% vs state
NCES ID 160210000674
Student demographics
White 74.2%
Hispanic or Latino 12.6%
African American 4.5%
Two or More 4.5%
Asian 3.7%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 74.2% of enrollment.
Programs & staff
AP courses offered 15
Gifted & talented Yes
Counselors (FTE) 6.0
Students per counselor 290:1
Discipline & special education
In-school suspensions 107
Out-of-school suspensions 38
Funding & spending
District-wide per-pupil expenditure for Joint School District No. 2, which includes Centennial High School.
$8,978
Per student
-31%
vs Idaho
Avg $12,943
-54%
vs U.S.
Avg $19,490
Revenue mix
Local 22.0%
State 63.9%
Federal 14.1%
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.
Other Schools in This District
- Enrollment
- 2,463
- Students per teacher
- 21.8:1
- Enrollment
- 1,884
- Students per teacher
- 22.4:1
- Enrollment
- 1,848
- Students per teacher
- 22.8:1
- Enrollment
- 1,774
- Students per teacher
- 19:1
- Enrollment
- 1,765
- Students per teacher
- 22.2:1
Similar high schools in Boise
6 comparable high schools (grades 9-12) serving the same city.
Boise Senior High School
Standard public school
1,512 students 18.7:1 students per teacher
Borah Senior High School
Standard public school
1,308 students 15.7:1 students per teacher
Timberline High School
Standard public school
1,307 students 18.9:1 students per teacher
Capital Senior High School
Standard public school
1,170 students 16.9:1 students per teacher
Isucceed Academy
Alternative education program
345 students 30.5:1 students per teacher
Cardinal Academy
Alternative education program
53 students 6.2:1 students per teacher
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Frequently asked questions about Centennial High School
How many students attend Centennial High School?
Centennial High School has 1,743 students enrolled. It is a high school in BOISE, ID.
What is the student-teacher ratio at Centennial High School?
The student-teacher ratio at Centennial High School is 21.2:1, which is 23% higher than the Idaho average of 17.3:1 and 33% higher than the national average of 15.9:1.
What percentage of students receive free lunch at Centennial High School?
16.1% of students at Centennial High School are eligible for free lunch, compared to the Idaho average of 29.3%.
What is the racial and ethnic makeup of Centennial High School?
The largest demographic group at Centennial High School is White at 74.2%. The school serves a diverse student body in BOISE, ID.
What is the Resource Investment Index for Centennial High School?
Centennial High School has a Resource Investment Index of 51/100 (C-) based on 4 factors: student-teacher ratio, AP course offerings, counselor availability. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.