Enrollment
501
Arizona · 2024-25 NCES data
Middle school (grades 6-8) · Tucson, AZ
Gridley Middle School
Federal NCES profile for Gridley Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 43/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 040880000848
👥 S:T ratio 52
🌟 Gifted program 70
🎓 Counselors 50
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Gridley Middle School earns 43/100 on the Resource Investment Index, with class sizes smaller than 85% of Arizona schools.
- #8 of 25
- middle schools in Tucson · Resource Index
- 43
- Resource Index · Typical
- 11.9:1
- small classes for Arizona
- 48.9%
- free-lunch eligible
Gridley Middle School has class sizes smaller than 85% of Arizona schools. Computed live against every Arizona school reporting to NCES.
By Resource Investment Index, Gridley Middle School ranks #8 of 25 middle schools in Tucson, AZ.
School address
District: Tucson Unified District (4403) · Arizona
NCES ID 040880000848 Verify on NCES CCD record →
Teachers (FTE)
42.0
Federal CCD staff survey
Students per teacher
11.9:1
vs 17:1 Arizona avg
-30% vs state
Free-lunch eligible
48.9%
vs 48.3% Arizona avg
+1% vs state
Student-teacher ratio in context
How Gridley Middle School compares with Arizona and U.S. medians
What stands out at Gridley Middle School
Gridley Middle School is a mid-sized middle school in Tucson, Arizona, enrolling 501 students.
Classes run notably small here: at 11.9:1, Gridley Middle School is leaner than roughly 85% of Arizona schools and 30% under the state's 17:1 norm, more adult attention per pupil than most peers.
Its free-meal eligibility rate of 48.9% lands close to the Arizona typical range, neither a high- nor low-need campus by this measure.
With 501 students, its enrollment sits close to the Arizona median campus size.
Its Resource Investment Index lands in the upper third of 2,064 scored Arizona schools.
Among 335 similarly sized, similarly resourced-need Arizona schools statewide, it ranks #29, a top-tier result once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (42%) and White (38%) (diversity index 67/100).
Counselor coverage runs a bit thin, about 251 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Chronic absenteeism is elevated: 83.8% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 23.6% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Discipline events run high: 101 in- and out-of-school suspensions were reported for 501 students in the 2021-22 Civil Rights Data Collection.
Among Tucson's middle schools, it stands alongside Apollo Middle School (480 students): Gridley Middle School is larger than that campus by headcount and runs leaner classes (11.9:1 vs 14.1:1).
Tucson Unified District (4403) also operates Tucson Magnet High School (2,938 students) and Pueblo High School (1,821 students) alongside Gridley 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 Gridley Middle School compares
Gridley Middle School on the metrics families compare, against Arizona and U.S. means.
| Metric | This school | vs Arizona | Arizona avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.9:1 | ▼ 30% | 17:1 | 15.7:1 |
| Free-lunch eligible | 48.9% | ▲ 1% | 48.3% | 51.7% |
| Enrollment | 501 | top 39% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.9:1
Leaner classes than 76% of US schools, among the more generously staffed nationally.
501
Bigger than 62% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
48.9%
free-lunch eligible
- 1% above the Arizona average of 48.3%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
11.9:1
students per teacher
- 30% below state mean
Top 15% in Arizona - lower ratio than 85% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
83.8%
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
$11,545
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
Counselors2.0 FTE
Per 251 students, the combined health-and-guidance staffing load for this school.
Discipline context
15
in-school suspensions + 86 out-of-school
Suspension rate: 3.0 per 100 students. Combined in-school and out-of-school rate: 20.2 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
Hispanic or Latino 41.7%
White 38.1%
African American 8.4%
Two or More 7.0%
Asian 2.2%
Native Hawaiian / Pacific Islander 1.4%
American Indian / Alaska Native 1.2%
Largest group: Hispanic or Latino at 41.7% of enrollment.
Student-body diversity index 66.8/100
Simpson diversity index - at 66.8, Gridley Middle School is more mixed than the Arizona school average of 47.2.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Tucson Unified District (4403), which includes Gridley Middle School.
$11,545
Per student
-12%
vs Arizona
Avg $13,145
-30%
vs U.S.
Avg $16,593
Revenue mix
Local 41.8%
State 34.7%
Federal 23.6%
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 Gridley Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Tucson Magnet High School | Larger | Similar economic need | Higher S:T ratio |
| Pueblo High School | Larger | Higher economic need | Higher S:T ratio |
| Cholla High School | Larger | Similar economic need | Higher S:T ratio |
| Sahuaro High School | Larger | Similar economic need | Higher S:T ratio |
| Catalina Online Learning Experience | Larger | No free-lunch data | No ratio data |
Comparisons are relative to Gridley Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,938
- Students per teacher
- 18.1:1
- Resource Index
- 43/100
- Enrollment
- 1,821
- Students per teacher
- 17.7:1
- Resource Index
- 36/100
- Enrollment
- 1,575
- Students per teacher
- 17.1:1
- Resource Index
- 41/100
- Enrollment
- 1,250
- Students per teacher
- 18.7:1
- Resource Index
- 37/100
- Enrollment
- 1,184
- Students per teacher
- -
- Resource Index
- 15/100
Similar middle schools in Tucson
2 comparable middle schools (grades 6-8) serving the same city.
Similar middle 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.
Similar enrollment (~501 students)
Similar student-teacher ratio (~11.9:1)
Next steps
Verify locally before acting on Gridley Middle School's federal record.
- Compare Gridley Middle School against another school. Compare schools
- Tucson Unified District (4403)'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 Gridley Middle School
How many students attend Gridley Middle School?
Gridley Middle School has 501 students enrolled. It is a middle school in Tucson, AZ.
What is the student-teacher ratio at Gridley Middle School?
The student-teacher ratio at Gridley Middle School is 11.9:1, which is 30% lower than the Arizona average of 17:1 and 24% 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 Gridley Middle School?
48.9% of students at Gridley Middle School are eligible for free lunch, compared to the Arizona average of 48.3%.
What is the racial and ethnic makeup of Gridley Middle School?
The largest demographic group at Gridley Middle School is Hispanic or Latino at 41.7% of enrollment, in Tucson, AZ. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.8/100.
What is the Resource Investment Index for Gridley Middle School?
Gridley Middle School has a Resource Investment Index of 43/100 (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 Gridley Middle School rank among middle schools in Tucson?
By Resource Investment Index, Gridley Middle School ranks #8 of 25 middle schools in Tucson, AZ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Tucson on the city page.
Is Gridley Middle School a good school?
Gridley Middle School earns 43/100 on the Resource Investment Index, with class sizes smaller than 85% of Arizona 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 Tucson Unified District (4403)?
Besides Gridley Middle School, Tucson Unified District (4403) also operates Tucson Magnet High School (2,938 students), Pueblo High School (1,821 students), and Cholla High School (1,575 students). See the Tucson Unified District (4403) 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.