Serving 465 students in grades Kindergarten-5, Marbrook Elementary School ranks in the top 30% of all schools in Delaware for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 40-44% (which is higher than the Delaware state average of 31%). The percentage of students achieving proficiency in reading/language arts is 53% (which is higher than the Delaware state average of 42%).
The student-teacher ratio of 12:1 is lower than the Delaware state level of 15:1.
Minority enrollment is 64% of the student body (majority Hispanic), which is higher than the Delaware state average of 62% (majority Black and Hispanic).
Quick Facts (2026)
- Grades: Kindergarten-5
- Enrollment: 465 students
- Student-Teacher Ratio: 12:1
- Minority Enrollment: 64%
- Overall Testing Rank: Top 30% in DE
- Math Proficiency: 40-44% (Top 30%)
- Reading Proficiency: 53% (Top 20%)
- Science Proficiency: 20-24% (Top 50%)
- Attendance Zone: Marbrook Elementary School serves the southeast part of Wilmington, DE, covering an area of approximately 2.9 square miles. Families typically have a drive of 5-10 minutes to the school, with the furthest edge of the attendance zone being about 1.6 miles away.
- Source: National Center for Education Statistics (NCES), DE Dept. of Education
Top Rankings
Marbrook Elementary School ranks among the top 20% of public schools in Delaware for:
Category
Attribute
Most improved public schools
Reading/Language Arts Proficiency
School Overview
Marbrook Elementary School's student population of 465 students has grown by 8% over five school years.
The teacher population of 39 teachers has grown by 11% over five school years.
Grades Offered
Grades Kindergarten-5
(No virtual instruction)
(No virtual instruction)
Total Students
465 students
Total Classroom Teachers
39 teachers
Year Founded
1905
Average Class Size
15 students
School Rankings
Marbrook Elementary School ranks within the top 30% of all 199 schools in Delaware (based off of combined math and reading proficiency testing data).
The diversity score of Marbrook Elementary School is 0.61, which is less than the diversity score at state average of 0.72. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#41 out of 199 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
40-44%
31%
Reading/Language Arts Test Scores (% Proficient)
53%
42%
Science Test Scores (% Proficient)
20-24%
21%
Student-Teacher Ratio
12:1
15:1
American Indian
n/a
n/a
Asian
2%
5%
Hispanic
51%
20%
Black
9%
31%
White
36%
38%
Hawaiian
n/a
n/a
Two or more races
2%
6%
All Ethnic Groups
Chronically Absent Students
(22-23)18.3%
24.3%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
52%
33%
Eligible for Reduced Lunch (12-13)
5%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), DE Dept. of Education
Frequently Asked Questions
What is Marbrook Elementary School's ranking?
Marbrook Elementary School is ranked #41 out of 199 schools, which ranks it among the top 30% of public schools in Delaware.
What schools are Marbrook Elementary School often compared to?
Marbrook Elementary Schoolis often viewed alongside schools like Brandywine Springs School, Linden Hill Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
40-44% of students have achieved math proficiency (compared to the 31% DE state average), while 53% of students have achieved reading proficiency (compared to the 42% DE state average).
How many students attend Marbrook Elementary School?
465 students attend Marbrook Elementary School.
What is the racial composition of the student body?
51% of Marbrook Elementary School students are Hispanic, 36% of students are White, 9% of students are Black, 2% of students are Asian, and 2% of students are Two or more races.
What is the student-teacher ratio of Marbrook Elementary School?
Marbrook Elementary School has a student ration of 12:1, which is lower than the Delaware state average of 15:1.
What grades does Marbrook Elementary School offer ?
Marbrook Elementary School offers enrollment in grades Kindergarten-5 (No virtual instruction).
What school district is Marbrook Elementary School part of?
Marbrook Elementary School is part of Red Clay Consolidated School District.
School Reviews
5 10/10/2025
Fantastic. My child has learned more here than he did at Tower Hill. Just a wonderful place for your little one.
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