Enrollment
580
Georgia · 2024-25 NCES data
Other / mixed grade configuration · Marietta, GA
Blackwell Elementary School
Federal NCES profile for Blackwell Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 45/100.
2024-25 NCES dataOther / mixed grade configurationNCES 130129002249
👥 S:T ratio 56
🌟 Gifted program 70
🎓 Counselors 42
📋 Attendance 13
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Blackwell Elementary School earns 45/100 on the Resource Investment Index, with class sizes smaller than 90% of Georgia schools. It is also more racially and ethnically mixed than most Georgia schools.
- #21 of 30
- schools in Marietta · Resource Index
- 45
- Resource Index · Typical
- 10.9:1
- small classes for Georgia
- 30.2%
- free-lunch eligible
Blackwell Elementary School has class sizes smaller than 90% of Georgia schools. Computed live against every Georgia school reporting to NCES.
By Resource Investment Index, Blackwell Elementary School ranks #21 of 30 schools in Marietta, GA.
School address
Teachers (FTE)
53.0
Federal CCD staff survey
Students per teacher
10.9:1
vs 14.4:1 Georgia avg
-24% vs state
Free-lunch eligible
30.2%
vs 60.7% Georgia avg
-50% vs state
Student-teacher ratio in context
How Blackwell Elementary School compares with Georgia and U.S. medians
What stands out at Blackwell Elementary School
Blackwell Elementary School is a mid-sized combined-grade school in Marietta, Georgia, enrolling 580 students.
Classes run notably small here: at 10.9:1, Blackwell Elementary School is leaner than roughly 90% of Georgia schools and 24% under the state's 14.4:1 norm, more adult attention per pupil than most peers.
Economic need runs somewhat below the state's typical profile, with 30.2% of students eligible for free meals.
With 580 students, its enrollment sits close to the Georgia median campus size.
Its Resource Investment Index sits near the middle of the pack among 2,314 scored Georgia schools.
Against 303 statewide peers matched on enrollment and economic need, it ranks mid-pack at #133.
Its student body is led by White (43%) and Hispanic or Latino (25%), more mixed than most schools in the state (diversity index 72/100).
Counselor coverage runs a bit thin, about 290 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Chronic absenteeism is elevated: 34.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Marietta's public schools, it stands alongside Sope Creek Elementary School (1,104 students): Blackwell Elementary School is smaller than that campus by headcount and runs leaner classes (10.9:1 vs 15.3:1).
Cobb County also operates Campbell High School (3,085 students) and Osborne High School (2,790 students) alongside Blackwell 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 Blackwell Elementary School compares
Blackwell Elementary School on the metrics families compare, against Georgia and U.S. means.
| Metric | This school | vs Georgia | Georgia avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 10.9:1 | ▼ 24% | 14.4:1 | 15.7:1 |
| Free-lunch eligible | 30.2% | ▼ 50% | 60.7% | 51.7% |
| Enrollment | 580 | top 57% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.9:1
Leaner classes than 84% of US schools, among the more generously staffed nationally.
580
Bigger than 71% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
30.2%
free-lunch eligible
- 50% below the Georgia average of 60.7%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
10.9:1
students per teacher
- 24% below state mean
Top 10% in Georgia - lower ratio than 90% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
34.7%
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
$13,203
per pupil, district-wide
- below Georgia avg of $13,863
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors2.0 FTE
Per 290 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 13 out-of-school
Suspension rate: 0.0 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
White 42.6%
Hispanic or Latino 25.3%
African American 15.5%
Two or More 9.5%
Asian 6.4%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 42.6% of enrollment.
Student-body diversity index 71.7/100
Simpson diversity index - at 71.7, Blackwell Elementary School is more mixed than the Georgia school average of 50.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Cobb County, which includes Blackwell Elementary School.
$13,203
Per student
-5%
vs Georgia
Avg $13,863
-20%
vs U.S.
Avg $16,593
Revenue mix
Local 52.6%
State 35.4%
Federal 11.9%
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 Blackwell Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Campbell High School | Larger | Higher economic need | Higher S:T ratio |
| Osborne High School | Larger | Higher economic need | Higher S:T ratio |
| Walton High School | Larger | Lower economic need | Higher S:T ratio |
| Pebblebrook High School | Larger | Higher economic need | Higher S:T ratio |
| North Cobb High School | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Blackwell Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,085
- Students per teacher
- 18.8:1
- Resource Index
- 37/100
- Enrollment
- 2,790
- Students per teacher
- 17:1
- Resource Index
- 44/100
- Enrollment
- 2,705
- Students per teacher
- 19.7:1
- Resource Index
- 43/100
- Enrollment
- 2,574
- Students per teacher
- 17.8:1
- Resource Index
- 38/100
- Enrollment
- 2,463
- Students per teacher
- 17.5:1
- Resource Index
- 39/100
Similar other schools in Marietta
6 comparable other schools (grades Mixed) serving the same city.
Sope Creek Elementary School
Standard public school
1,104 students 15.3:1 students per teacher
East Side Elementary School
Standard public school
1,072 students 13.9:1 students per teacher
Cheatham Hill Elementary School
Standard public school
1,021 students 13.4:1 students per teacher
Brumby Elementary School
Standard public school
963 students 12.3:1 students per teacher
Mount Bethel Elementary School
Standard public school
898 students 13.2:1 students per teacher
Dowell Elementary School
Standard public school
898 students 13:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Georgia, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~580 students)
Next steps
Verify locally before acting on Blackwell Elementary School's federal record.
- Compare Blackwell Elementary School against another school. Compare schools
- Cobb County'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 Blackwell Elementary School
How many students attend Blackwell Elementary School?
Blackwell Elementary School has 580 students enrolled. It is a public school in Marietta, GA.
What is the student-teacher ratio at Blackwell Elementary School?
The student-teacher ratio at Blackwell Elementary School is 10.9:1, which is 24% lower than the Georgia average of 14.4:1 and 31% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Blackwell Elementary School?
30.2% of students at Blackwell Elementary School are eligible for free lunch, compared to the Georgia average of 60.7%.
What is the racial and ethnic makeup of Blackwell Elementary School?
The largest demographic group at Blackwell Elementary School is White at 42.6% of enrollment, in Marietta, GA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 71.7/100.
What is the Resource Investment Index for Blackwell Elementary School?
Blackwell Elementary School has a Resource Investment Index of 45/100 (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 Blackwell Elementary School rank among schools in Marietta?
By Resource Investment Index, Blackwell Elementary School ranks #21 of 30 schools in Marietta, GA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Marietta on the city page.
Is Blackwell Elementary School a good school?
Blackwell Elementary School earns 45/100 on the Resource Investment Index, with class sizes smaller than 90% of Georgia schools. It is also more racially and ethnically mixed than most Georgia 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 Cobb County?
Besides Blackwell Elementary School, Cobb County also operates Campbell High School (3,085 students), Osborne High School (2,790 students), and Walton High School (2,705 students). See the Cobb County 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.