Enrollment
552
Delaware · 2024-25 NCES data
2024-25 NCES data Middle school (grades 6-8) NCES 100017000033
Mariner Middle School — Milton, DE
Federal NCES profile for Mariner Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 44/100.
👥 Class size 44
🌟 Gifted program 70
🎓 Counselors 45
📋 Attendance 16
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: Cape Henlopen School District · Delaware
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)
47.0
Federal CCD staff survey
Students per teacher
14.1:1
vs 14.1:1 Delaware avg
+0% vs state
Student-teacher ratio in context
How Mariner Middle School compares with Delaware 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
Mariner Middle School reports 552 enrolled students to the National Center for Education Statistics (NCES) alongside 47.0 full-time-equivalent teachers, producing a 14.1:1 student-teacher ratio. That figure sits 0% above the Delaware state mean of 14.1:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 11% lower, a useful calibration for families comparing districts across state lines.
Counselor coverage works out to roughly 276 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 33.7% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Cape Henlopen School District spends $25,178 per pupil district-wide, above the Delaware average of $18,485 and above the national average of $19,490. Revenue comes 41.8% from local sources (property taxes), 49.1% from the state, and 9.1% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 44/100 (D), 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 Mariner Middle School compares
Cross-validating school-level NCES values against Delaware state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Delaware | Delaware avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.1:1 | ▼ 0% | 14.1:1 | 15.9:1 |
| Enrollment | 552 | top 55% | — | — |
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.
Staffing depth
14.1:1
students per teacher
— 0% above state mean
Top 52% in Delaware — lower ratio than 48% of state schools
Below the 15:1 benchmark — typical of schools with smaller class sizes and more individualized attention.
Engagement
33.7%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$25,178
per pupil, district-wide
— above Delaware avg of $18,485
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors2.0 FTE
Per 276 students — the combined health-and-guidance staffing load for this school.
Discipline context
33
in-school suspensions + 40 out-of-school
Suspension rate: 6.0 per 100 students. Combined in-school and out-of-school rate: 13.2 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 552 Top 55% in Delaware — larger than 45% of 223 state schools
Teachers (FTE) 47.0
Students per teacher 14.1:1 +0% vs state
Free-lunch eligible —
NCES ID 100017000033
Student demographics
White 54.7%
Hispanic or Latino 27.4%
African American 11.1%
Two or More 6.0%
Asian 0.7%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 54.7% of enrollment.
Programs & staff
Gifted & talented Yes
Counselors (FTE) 2.0
Students per counselor 276:1
Discipline & special education
Chronically absent 33.7%
In-school suspensions 33
Out-of-school suspensions 40
Funding & spending
District-wide per-pupil expenditure for Cape Henlopen School District, which includes Mariner Middle School.
$25,178
Per student
+36%
vs Delaware
Avg $18,485
+29%
vs U.S.
Avg $19,490
Revenue mix
Local 41.8%
State 49.1%
Federal 9.1%
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
- 1,889
- Students per teacher
- 14.9:1
- Enrollment
- 631
- Students per teacher
- —
- Enrollment
- 620
- Students per teacher
- 14.2:1
- Enrollment
- 582
- Students per teacher
- 13.9:1
- Enrollment
- 557
- Students per teacher
- 11.9:1
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 Mariner Middle School
How many students attend Mariner Middle School?
Mariner Middle School has 552 students enrolled. It is a middle school in Milton, DE.
What is the student-teacher ratio at Mariner Middle School?
The student-teacher ratio at Mariner Middle School is 14.1:1, which is 0% higher than the Delaware average of 14.1:1 and 11% lower than the national average of 15.9:1.
What is the racial and ethnic makeup of Mariner Middle School?
The largest demographic group at Mariner Middle School is White at 54.7%. The school serves a diverse student body in Milton, DE.
What is the Resource Investment Index for Mariner Middle School?
Mariner Middle School has a Resource Investment Index of 44/100 (D) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.