- Enrollment
- 1,164
- Students per teacher
- 17.9:1
- Resource Index
- 40/100
Elementary school (grades K-5) · Wilmington, DE
Marbrook Elementary School
Federal NCES profile for Marbrook Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
2024-25 NCES dataElementary school (grades K-5)NCES 100130000255
👥 S:T ratio 51
🌟 Gifted program 70
🎓 Counselors 54
📋 Attendance 55
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Marbrook Elementary School earns 57/100 on the Resource Investment Index, with class sizes smaller than 71% of Delaware schools.
- #3 of 24
- elementary schools in Wilmington · Resource Index
- 57
- Resource Index · Higher
- 12.2:1
- small classes for Delaware
- 465
- students enrolled
Marbrook Elementary School has class sizes smaller than 71% of Delaware schools. Computed live against every Delaware school reporting to NCES.
By Resource Investment Index, Marbrook Elementary School ranks #3 of 24 elementary schools in Wilmington, DE.
School address
District: Red Clay Consolidated School District · Delaware
NCES ID 100130000255 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+32 students YoY
Marbrook Elementary School grew from 399 students in 2022-23 to 431 in 2023-24 (+8.0%).
Teacher FTE lost 38.0 → 36.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+32 students YoY 100130000255 · Wilmington, DE Elementary · SMALL · TRAD
465 enr · 12.2:1 · RII 57
Nearest enrollment peer: Conrad Schools of Science (1,164 students)
Marbrook Elementary School grew from 399 students in 2022-23 to 431 in 2023-24 (+8.0%). Teacher FTE lost 38.0 → 36.5 across the same CCD years. Read with this school → · District book → · Delaware schools → · Find another →
Marbrook Elementary School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Conrad Schools
Conrad Schools of Science
1,164 students
- Dickinson (Joh
Dickinson (John) School
1,027 students
- Calloway (Cab)
Calloway (Cab) School of the Arts
941 students
- Brandywine Spr
Brandywine Springs School
941 students
- Mckean (Thomas
Mckean (Thomas) High School
920 students
- This school 465
Marbrook Elementary School
465 students
What this shows Marbrook Elementary School reports 465 students on the CCD universe file.
How Marbrook Elementary School compares
Marbrook Elementary School is a growing campus on CCD: ratios and free-lunch share vs Delaware and U.S. means.
| Metric | This school | vs Delaware | Delaware avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.2:1 | ▼ 12% | 13.9:1 | 15.7:1 |
| Enrollment | 465 | top 58% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.2:1
Leaner classes than 74% of US schools, among the more generously staffed nationally.
465
Bigger than 57% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
12.2:1
students per teacher
- 12% below state mean
Top 29% in Delaware - lower ratio than 71% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
18.1%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$22,094
per pupil, district-wide
- above Delaware avg of $18,304
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors2.0 FTE
Per 233 students, the combined health-and-guidance staffing load for this school.
Discipline context
5
in-school suspensions + 8 out-of-school
Suspension rate: 1.1 per 100 students. Combined in-school and out-of-school rate: 2.8 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 51.2%
White 35.9%
African American 9.2%
Two or More 2.2%
Asian 1.3%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Hispanic or Latino at 51.2% of enrollment.
Student-body diversity index 60.0/100
Simpson diversity index - at 60.0, Marbrook Elementary School is about as mixed as the Delaware school average of 61.3.
Programs
Gifted & talented Yes
District finance for Red Clay Consolidated School District reports $22,094 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Marbrook Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Conrad Schools of Science | Larger | No free-lunch data | Higher S:T ratio |
| Dickinson (John) School | Larger | No free-lunch data | Higher S:T ratio |
| Calloway (Cab) School of the Arts | Larger | No free-lunch data | Higher S:T ratio |
| Brandywine Springs School | Larger | No free-lunch data | Higher S:T ratio |
| Mckean (Thomas) High School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Marbrook Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,027
- Students per teacher
- 16:1
- Resource Index
- 34/100
- Enrollment
- 941
- Students per teacher
- 18.1:1
- Resource Index
- 43/100
- Enrollment
- 941
- Students per teacher
- 15.4:1
- Resource Index
- 47/100
- Enrollment
- 920
- Students per teacher
- 13:1
- Resource Index
- 33/100
Similar elementary schools in Wilmington
6 comparable elementary schools (grades K-5) serving the same city.
Brandywine Springs School
Standard public school
941 students 15.4:1 students per teacher
Mount Pleasant Elementary School
Standard public school
674 students 12.5:1 students per teacher
First State Montessori Academy
Standard public school
657 students 19.3:1 students per teacher
Kuumba Academy Charter School
Standard public school
594 students 10.2:1 students per teacher
The Bayard School
Standard public school
571 students 10.4:1 students per teacher
Edison (Thomas a.) Charter School
Standard public school
557 students 15.1:1 students per teacher
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~465 students)
Frequently asked questions about Marbrook Elementary School
How many students attend Marbrook Elementary School?
Marbrook Elementary School has 465 students enrolled. It is an elementary school in Wilmington, DE. CCD year-over-year: 399 (2022-23) → 431 (2023-24), up 32.
What is the student-teacher ratio at Marbrook Elementary School?
The student-teacher ratio at Marbrook Elementary School is 12.2:1, which is 12% lower than the Delaware average of 13.9:1 and 22% 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 Marbrook Elementary School?
The largest demographic group at Marbrook Elementary School is Hispanic or Latino at 51.2% of enrollment, in Wilmington, DE. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 60.0/100.
What is the Resource Investment Index for Marbrook Elementary School?
Marbrook Elementary School has a Resource Investment Index of 57/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Marbrook Elementary School rank among elementary schools in Wilmington?
By Resource Investment Index, Marbrook Elementary School ranks #3 of 24 elementary schools in Wilmington, DE. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Wilmington on the city page.
What other schools are in Red Clay Consolidated School District?
Besides Marbrook Elementary School, Red Clay Consolidated School District also operates Conrad Schools of Science (1,164 students), Dickinson (John) School (1,027 students), and Calloway (Cab) School of the Arts (941 students). See the Red Clay Consolidated School District district page for the complete list.