Enrollment
56
Arizona · 2024-25 NCES data
Other / mixed grade configuration · Phoenix, AZ
Robert L. Duffy High School
Federal NCES profile for Robert L. Duffy High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataOther / mixed grade configurationNCES 040021902367Charter school
🌟 Gifted program 30
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Robert L. Duffy High School earns 30/100 on the Resource Investment Index on federal resource data.
- #85 of 179
- schools in Phoenix · Resource Index
- 30
- Resource Index · Lower
- 69.6%
- free-lunch eligible
- 56
- students enrolled
By Resource Investment Index, Robert L. Duffy High School ranks #85 of 179 schools in Phoenix, AZ.
School address
District: Career Success Schools (79047) · Arizona
NCES ID 040021902367 Verify on NCES CCD record →
Free-lunch eligible
69.6%
vs 48.3% Arizona avg
+44% vs state
What stands out at Robert L. Duffy High School
Robert L. Duffy High School is a higher-need, small charter combined-grade school in Phoenix, Arizona, enrolling 56 students.
Economic need runs somewhat above the state's typical profile, with 69.6% of students eligible for free meals.
Enrollment of 56 puts it in the smaller third of Arizona schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 2,064 scored Arizona schools.
Against 33 statewide peers matched on enrollment and economic need, it ranks mid-pack at #17.
Its student body is led by Hispanic or Latino (75%) and White (9%) (diversity index 42/100).
The surrounding Career Success Schools (79047) spends $8,078 per pupil, 39% below the Arizona average, a leaner-resourced district than most.
Its district draws 21.7% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Phoenix's public schools, it stands alongside Pan-American Charter School (1,221 students): Robert L. Duffy High School is smaller than that campus by headcount.
Career Success Schools (79047) also operates Career Success Schools - Stem Academy 7-12 (519 students) and Tech Campus (442 students) alongside Robert L. Duffy High 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 Robert L. Duffy High School compares
Robert L. Duffy High School on the metrics families compare, against Arizona and U.S. means.
| Metric | This school | vs Arizona | Arizona avg | U.S. avg |
|---|---|---|---|---|
| Free-lunch eligible | 69.6% | ▲ 44% | 48.3% | 51.7% |
| Enrollment | 56 | top 88% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
56
Bigger than 6% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
69.6%
free-lunch eligible
- 44% above the Arizona average of 48.3%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Funding equity
$8,078
per pupil, district-wide
- below Arizona avg of $13,145
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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
Hispanic or Latino 75.0%
White 8.9%
African American 7.1%
Two or More 5.4%
American Indian / Alaska Native 3.6%
Largest group: Hispanic or Latino at 75.0% of enrollment.
Student-body diversity index 42.0/100
Simpson diversity index - at 42.0, Robert L. Duffy High School is less mixed than the Arizona school average of 47.2.
Programs
Funding & spending
District-wide per-pupil expenditure for Career Success Schools (79047), which includes Robert L. Duffy High School.
$8,078
Per student
-39%
vs Arizona
Avg $13,145
-51%
vs U.S.
Avg $16,593
Revenue mix
Local 1.5%
State 76.8%
Federal 21.7%
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 Robert L. Duffy High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Career Success Schools - Stem Academy 7-12 | Larger | Lower economic need | No ratio data |
| Tech Campus | Larger | Lower economic need | No ratio data |
| Career Success School - Sage Campus | Larger | Similar economic need | No ratio data |
Comparisons are relative to Robert L. Duffy High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 519
- Students per teacher
- -
- Resource Index
- 62/100
- Enrollment
- 442
- Students per teacher
- -
- Resource Index
- 21/100
- Enrollment
- 128
- Students per teacher
- -
- Resource Index
- 15/100
Similar other schools in Phoenix
6 comparable other schools (grades Mixed) serving the same city.
Pan-American Charter School
Standard public school
1,221 students
Great Hearts Academies - Anthem Prep
Standard public school
1,031 students
Westwind Elementary School
Standard public school
932 students 19.4:1 students per teacher
Stetson Hills School
Standard public school
887 students 17.4:1 students per teacher
Union Park School
Standard public school
873 students 19:1 students per teacher
Fireside Elementary School
Standard public school
693 students 15.1:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Arizona, not just this city - a different peer set than the local comparisons above.
Next steps
Verify locally before acting on Robert L. Duffy High School's federal record.
- Compare Robert L. Duffy High School against another school. Compare schools
- Career Success Schools (79047)'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 Robert L. Duffy High School
How many students attend Robert L. Duffy High School?
Robert L. Duffy High School has 56 students enrolled. It is an alternative school in Phoenix, AZ.
What percentage of students receive free lunch at Robert L. Duffy High School?
69.6% of students at Robert L. Duffy High School are eligible for free lunch, compared to the Arizona average of 48.3%.
What is the racial and ethnic makeup of Robert L. Duffy High School?
The largest demographic group at Robert L. Duffy High School is Hispanic or Latino at 75.0% of enrollment, in Phoenix, AZ.
What is the Resource Investment Index for Robert L. Duffy High School?
Robert L. Duffy High School has a Resource Investment Index of 30/100 (lower reported resources relative to schools nationally) based on 1 factor: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology). Limited indicators were available, so the index reflects partial data.
How does Robert L. Duffy High School rank among schools in Phoenix?
By Resource Investment Index, Robert L. Duffy High School ranks #85 of 179 schools in Phoenix, AZ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Phoenix on the city page.
Is Robert L. Duffy High School a good school?
Robert L. Duffy High School earns 30/100 on the Resource Investment Index on federal resource data. 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 Career Success Schools (79047)?
Besides Robert L. Duffy High School, Career Success Schools (79047) also operates Career Success Schools - Stem Academy 7-12 (519 students), Tech Campus (442 students), and Career Success School - Sage Campus (128 students). See the Career Success Schools (79047) 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.