Enrollment
552
Delaware · 2024-25 NCES data
Middle school (grades 6-8) · Milton, DE
Mariner Middle School
Federal NCES profile for Mariner Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 100017000033
👥 S:T ratio 53
🌟 Gifted program 70
🎓 Counselors 45
📋 Attendance 16
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mariner Middle School earns 46/100 on the Resource Investment Index, with class sizes smaller than 75% of Delaware schools.
- #1 of 3
- public schools in Milton · Resource Index
- 46
- Resource Index · Typical
- 11.7:1
- small classes for Delaware
- 552
- students enrolled
Mariner Middle School has class sizes smaller than 75% of Delaware schools. Computed live against every Delaware school reporting to NCES.
By Resource Investment Index, Mariner Middle School ranks #1 of 3 public schools in Milton, DE.
School address
District: Cape Henlopen School District · Delaware
NCES ID 100017000033 Verify on NCES CCD record →
Teachers (FTE)
47.0
Federal CCD staff survey
Students per teacher
11.7:1
vs 13.9:1 Delaware avg
-16% vs state
Student-teacher ratio in context
How Mariner Middle School compares with Delaware and U.S. medians
What stands out at Mariner Middle School
Mariner Middle School is a mid-sized middle school in Milton, Delaware, enrolling 552 students.
Class sizes run a bit leaner than typical: 11.7:1 puts it in the smaller third of Delaware schools by student-teacher ratio.
With 552 students, its enrollment sits close to the Delaware median campus size.
Its Resource Investment Index lands in the upper third of 222 scored Delaware schools.
Its student body is led by White (55%) and Hispanic or Latino (27%) (diversity index 61/100).
Counselor coverage runs a bit thin, about 276 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Chronic absenteeism is elevated: 33.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Cape Henlopen School District also operates Cape Henlopen High School (1,889 students) and Love Creek Elementary School (631 students) alongside Mariner Middle 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 Mariner Middle School compares
Mariner Middle School on the metrics families compare, against Delaware and U.S. means.
| Metric | This school | vs Delaware | Delaware avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.7:1 | ▼ 16% | 13.9:1 | 15.7:1 |
| Enrollment | 552 | top 45% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.7:1
Leaner classes than 78% of US schools, among the more generously staffed nationally.
552
Bigger than 68% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
11.7:1
students per teacher
- 16% below state mean
Top 25% in Delaware - lower ratio than 75% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
33.7%
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
$19,754
per pupil, district-wide
- above Delaware avg of $16,990
Somewhat 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
- 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 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.
Student-body diversity index 61.0/100
Simpson diversity index - at 61.0, Mariner Middle School is about as mixed as the Delaware school average of 61.3.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Cape Henlopen School District, which includes Mariner Middle School.
$19,754
Per student
+16%
vs Delaware
Avg $16,990
+19%
vs U.S.
Avg $16,593
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.
How Mariner Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Cape Henlopen High School | Larger | No free-lunch data | Higher S:T ratio |
| Love Creek Elementary School | Similar size | No free-lunch data | No ratio data |
| Lewes Elementary School | Similar size | No free-lunch data | Higher S:T ratio |
| Milton Elementary School | Similar size | No free-lunch data | Higher S:T ratio |
| Rehoboth Elementary School | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Mariner Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,889
- Students per teacher
- 15.5:1
- Resource Index
- 36/100
- Enrollment
- 631
- Students per teacher
- -
- Resource Index
- 39/100
- Enrollment
- 620
- Students per teacher
- 15.1:1
- Resource Index
- 41/100
- Enrollment
- 582
- Students per teacher
- 14.6:1
- Resource Index
- 39/100
- Enrollment
- 557
- Students per teacher
- 12.7:1
- Resource Index
- 40/100
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Delaware, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~552 students)
Similar student-teacher ratio (~11.7:1)
Next steps
Verify locally before acting on Mariner Middle School's federal record.
- Compare Mariner Middle School against another school. Compare schools
- Cape Henlopen 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 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 11.7:1, which is 16% lower than the Delaware average of 13.9:1 and 25% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Mariner Middle School?
The largest demographic group at Mariner Middle School is White at 54.7% of enrollment, in Milton, DE. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 61.0/100.
What is the Resource Investment Index for Mariner Middle School?
Mariner Middle School has a Resource Investment Index of 46/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mariner Middle School rank among public schools in Milton?
By Resource Investment Index, Mariner Middle School ranks #1 of 3 public schools in Milton, DE. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Milton on the city page.
Is Mariner Middle School a good school?
Mariner Middle School earns 46/100 on the Resource Investment Index, with class sizes smaller than 75% of Delaware 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 Cape Henlopen School District?
Besides Mariner Middle School, Cape Henlopen School District also operates Cape Henlopen High School (1,889 students), Love Creek Elementary School (631 students), and Lewes Elementary School (620 students). See the Cape Henlopen School District 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.