Enrollment
2,615
New York · 2024-25 NCES data
2024-25 NCES data High school (grades 9-12) NCES 360687000473
Central Islip Senior High School — Central Islip, NY
Federal NCES profile for Central Islip Senior High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 43/100.
👥 Class size 30
📚 AP courses 50
🌟 Gifted program 30
🎓 Counselors 13
📋 Attendance 93
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: Central Islip Union Free School District · New York
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)
147.0
Federal CCD staff survey
Students per teacher
17.5:1
vs 11.7:1 New York avg
+50% vs state
Free-lunch eligible
72.6%
vs 56.2% New York avg
+29% vs state
Student-teacher ratio in context
How Central Islip Senior High School compares with New York 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
Central Islip Senior High School reports 2,615 enrolled students to the National Center for Education Statistics (NCES) alongside 147.0 full-time-equivalent teachers, producing a 17.5:1 student-teacher ratio. That figure sits 50% above the New York state mean of 11.7:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 10% higher, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 72.6% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 29% above the New York average and 40% above the national baseline. The school offers 10 Advanced Placement courses, a stronger academic pipeline indicator than enrollment alone. Counselor coverage works out to roughly 436 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 2.8% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Central Islip Union Free School District spends $29,818 per pupil district-wide, above the New York average of $29,727 and above the national average of $19,490. Revenue comes 37.5% from local sources (property taxes), 53.6% from the state, and 8.9% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 43/100 (D), calculated from 5 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 Central Islip Senior High School compares
Cross-validating school-level NCES values against New York state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17.5:1 | ▲ 50% | 11.7:1 | 15.9:1 |
| Free-lunch eligible | 72.6% | ▲ 29% | 56.2% | 51.8% |
| Enrollment | 2,615 | 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
72.6%
free-lunch eligible
— 29% above the New York average of 56.2%
Above the 40% Title I schoolwide threshold — federal funds support the whole school, not individual students.
Staffing depth
17.5:1
students per teacher
— 50% above state mean
Top 97% in New York — lower ratio than 3% of state schools
Between 15:1 and 20:1 — in line with the typical U.S. public-school staffing range.
Engagement
2.8%
chronically absent (missed 10%+ of school days)
Below 10% — strong attendance relative to the post-pandemic national landscape.
Funding equity
$29,818
per pupil, district-wide
— above New York avg of $29,727
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors6.0 FTE
Per 436 students — the combined health-and-guidance staffing load for this school.
Discipline context
284
in-school suspensions + 178 out-of-school
Suspension rate: 10.9 per 100 students. Combined in-school and out-of-school rate: 17.7 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 2,615 Top 99% in New York — larger than 1% of 4,812 state schools
Teachers (FTE) 147.0
Students per teacher 17.5:1 +50% vs state
Free-lunch eligible 72.6% +29% vs state
NCES ID 360687000473
Student demographics
Hispanic or Latino 81.2%
African American 14.7%
White 1.6%
Asian 1.4%
Two or More 0.8%
American Indian / Alaska Native 0.2%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 81.2% of enrollment.
Programs & staff
AP courses offered 10
Counselors (FTE) 6.0
Students per counselor 436:1
Discipline & special education
Chronically absent 2.8%
In-school suspensions 284
Out-of-school suspensions 178
Funding & spending
District-wide per-pupil expenditure for Central Islip Union Free School District, which includes Central Islip Senior High School.
$29,818
Per student
+0%
vs New York
Avg $29,727
+53%
vs U.S.
Avg $19,490
Revenue mix
Local 37.5%
State 53.6%
Federal 8.9%
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
- 1,192
- Students per teacher
- 14:1
- Enrollment
- 997
- Students per teacher
- 15.1:1
- Enrollment
- 821
- Students per teacher
- 13.5:1
- Enrollment
- 600
- Students per teacher
- 14.6:1
- Enrollment
- 567
- Students per teacher
- 13.5:1
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 Central Islip Senior High School
How many students attend Central Islip Senior High School?
Central Islip Senior High School has 2,615 students enrolled. It is a high school in CENTRAL ISLIP, NY.
What is the student-teacher ratio at Central Islip Senior High School?
The student-teacher ratio at Central Islip Senior High School is 17.5:1, which is 50% higher than the New York average of 11.7:1 and 10% higher than the national average of 15.9:1.
What percentage of students receive free lunch at Central Islip Senior High School?
72.6% of students at Central Islip Senior High School are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Central Islip Senior High School?
The largest demographic group at Central Islip Senior High School is Hispanic or Latino at 81.2%. The school serves a diverse student body in CENTRAL ISLIP, NY.
What is the Resource Investment Index for Central Islip Senior High School?
Central Islip Senior High School has a Resource Investment Index of 43/100 (D) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.