Enrollment
997
New York · 2024-25 NCES data
Elementary school (grades K-5) · Central Islip, NY
Charles a Mulligan Elementary School
Federal NCES profile for Charles a Mulligan Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 23/100.
2024-25 NCES dataElementary school (grades K-5)NCES 360687000474
👥 S:T ratio 39
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Charles a Mulligan Elementary School earns 23/100 on the Resource Investment Index, with class sizes larger than 88% of New York schools.
- #4 of 4
- elementary schools in Central Islip · Resource Index
- 23
- Resource Index · Lower
- 15.3:1
- large classes for New York
- 74.7%
- free-lunch eligible
Charles a Mulligan Elementary School has class sizes larger than 88% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Charles a Mulligan Elementary School ranks #4 of 4 elementary schools in Central Islip, NY.
School address
District: Central Islip Union Free School District · New York
NCES ID 360687000474 Verify on NCES CCD record →
Teachers (FTE)
65.0
Federal CCD staff survey
Students per teacher
15.3:1
vs 11.8:1 New York avg
+30% vs state
Free-lunch eligible
74.7%
vs 56.2% New York avg
+33% vs state
Student-teacher ratio in context
How Charles a Mulligan Elementary School compares with New York and U.S. medians
What stands out at Charles a Mulligan Elementary School
Charles a Mulligan Elementary School is a higher-need, large elementary school in Central Islip, New York, enrolling 997 students.
Class loads run heavy: 15.3:1 is larger than about 88% of New York schools and 30% above the 11.8:1 state mean, so each teacher carries more students than is typical.
Economic need runs somewhat above the state's typical profile, with 74.7% of students eligible for free meals.
By headcount it is one of the larger campuses in New York, bigger than 92% of state schools at 997 students.
Its Resource Investment Index trails 91% of the 4,801 New York schools with a score on record, one of the lower results on this measure.
Among 407 similarly sized, similarly resourced-need New York schools statewide, it ranks #297, in the lower tier once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (83% of enrollment) (diversity index 30/100).
Chronic absenteeism is elevated: 45.6% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Central Islip Union Free School District also operates Central Islip Senior High School (2,615 students) and Ralph Reed School (1,192 students) alongside Charles a Mulligan Elementary 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 Charles a Mulligan Elementary School compares
Charles a Mulligan Elementary School on the metrics families compare, against New York and U.S. means.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.3:1 | ▲ 30% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 74.7% | ▲ 33% | 56.2% | 51.7% |
| Enrollment | 997 | top 8% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15.3:1
Leaner classes than 44% of US schools, a middle-of-the-pack class size.
997
Bigger than 91% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
74.7%
free-lunch eligible
- 33% 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
15.3:1
students per teacher
- 30% above state mean
Top 88% in New York - lower ratio than 12% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
45.6%
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
$28,339
per pupil, district-wide
- above New York avg of $26,410
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
1
in-school suspensions + 21 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 2.2 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
Hispanic or Latino 83.0%
African American 9.0%
Two or More 3.8%
Asian 2.0%
White 1.9%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 83.0% of enrollment.
Student-body diversity index 30.1/100
Simpson diversity index - at 30.1, Charles a Mulligan Elementary School is less mixed than the New York school average of 45.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Central Islip Union Free School District, which includes Charles a Mulligan Elementary School.
$28,339
Per student
+7%
vs New York
Avg $26,410
+71%
vs U.S.
Avg $16,593
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.
How Charles a Mulligan Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Central Islip Senior High School | Larger | Similar economic need | Higher S:T ratio |
| Ralph Reed School | Similar size | Similar economic need | Similar S:T ratio |
| Andrew T Morrow School | Similar size | Similar economic need | Similar S:T ratio |
| Francis J O'neill School | Smaller | Similar economic need | Similar S:T ratio |
| Marguerite L Mulvey School | Smaller | Similar economic need | Similar S:T ratio |
Comparisons are relative to Charles a Mulligan Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,615
- Students per teacher
- 17.8:1
- Resource Index
- 41/100
- Enrollment
- 1,192
- Students per teacher
- 14.5:1
- Resource Index
- 23/100
- Enrollment
- 821
- Students per teacher
- 13.9:1
- Resource Index
- 25/100
- Enrollment
- 600
- Students per teacher
- 14.3:1
- Resource Index
- 25/100
- Enrollment
- 567
- Students per teacher
- 14.5:1
- Resource Index
- 24/100
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of New York, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~997 students)
Similar student-teacher ratio (~15.3:1)
Next steps
Verify locally before acting on Charles a Mulligan Elementary School's federal record.
- Compare Charles a Mulligan Elementary School against another school. Compare schools
- Central Islip Union Free School District'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 Charles a Mulligan Elementary School
How many students attend Charles a Mulligan Elementary School?
Charles a Mulligan Elementary School has 997 students enrolled. It is an elementary school in Central Islip, NY.
What is the student-teacher ratio at Charles a Mulligan Elementary School?
The student-teacher ratio at Charles a Mulligan Elementary School is 15.3:1, which is 30% higher than the New York average of 11.8:1 and 3% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Charles a Mulligan Elementary School?
74.7% of students at Charles a Mulligan Elementary School are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Charles a Mulligan Elementary School?
The largest demographic group at Charles a Mulligan Elementary School is Hispanic or Latino at 83.0% of enrollment, in Central Islip, NY.
What is the Resource Investment Index for Charles a Mulligan Elementary School?
Charles a Mulligan Elementary School has a Resource Investment Index of 23/100 (lower 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 Charles a Mulligan Elementary School rank among elementary schools in Central Islip?
By Resource Investment Index, Charles a Mulligan Elementary School ranks #4 of 4 elementary schools in Central Islip, NY. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Central Islip on the city page.
Is Charles a Mulligan Elementary School a good school?
Charles a Mulligan Elementary School earns 23/100 on the Resource Investment Index, with class sizes larger than 88% of New York 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 Central Islip Union Free School District?
Besides Charles a Mulligan Elementary School, Central Islip Union Free School District also operates Central Islip Senior High School (2,615 students), Ralph Reed School (1,192 students), and Andrew T Morrow School (821 students). See the Central Islip Union Free School District district page for the complete list.
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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.