Enrollment
713
Arizona · 2024-25 NCES data
Elementary school (grades K-5) · Tolleson, AZ
Tres Rios Elementary School
Federal NCES profile for Tres Rios Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 29/100.
2024-25 NCES dataElementary school (grades K-5)NCES 040444002908
👥 S:T ratio 18
🌟 Gifted program 70
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Tres Rios Elementary School earns 29/100 on the Resource Investment Index, with class sizes larger than 78% of Arizona schools.
- #2 of 6
- elementary schools in Tolleson · Resource Index
- 29
- Resource Index · Lower
- 20.4:1
- large classes for Arizona
- 55.9%
- free-lunch eligible
Tres Rios Elementary School has class sizes larger than 78% of Arizona schools. Computed live against every Arizona school reporting to NCES.
By Resource Investment Index, Tres Rios Elementary School ranks #2 of 6 elementary schools in Tolleson, AZ.
School address
District: Littleton Elementary District (4278) · Arizona
NCES ID 040444002908 Verify on NCES CCD record →
Teachers (FTE)
35.0
Federal CCD staff survey
Students per teacher
20.4:1
vs 17:1 Arizona avg
+20% vs state
Free-lunch eligible
55.9%
vs 48.3% Arizona avg
+16% vs state
Student-teacher ratio in context
How Tres Rios Elementary School compares with Arizona and U.S. medians
What stands out at Tres Rios Elementary School
Tres Rios Elementary School is a higher-need, mid-sized elementary school in Tolleson, Arizona, enrolling 713 students.
Class loads run somewhat heavier than typical: 20.4:1 puts it in the larger third of Arizona schools by student-teacher ratio.
Its free-meal eligibility rate of 55.9% lands close to the Arizona typical range, neither a high- nor low-need campus by this measure.
Enrollment of 713 puts it in the larger third of Arizona schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 2,064 scored Arizona schools.
Against 317 statewide peers matched on enrollment and economic need, it ranks mid-pack at #139.
Its student body is predominantly Hispanic or Latino (83% of enrollment) (diversity index 30/100).
Chronic absenteeism is elevated: 44.6% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Littleton Elementary District (4278) spends $9,585 per pupil, 27% below the Arizona average, a leaner-resourced district than most.
Its district draws 20.5% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Tolleson's elementary schools, it stands alongside Tolleson Virtual Academy (37 students): Tres Rios Elementary School is larger than that campus by headcount and runs heavier classes (20.4:1 vs 6.2:1).
Littleton Elementary District (4278) also operates Quentin Elementary School (914 students) and Country Place Elementary (900 students) alongside Tres Rios 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 Tres Rios Elementary School compares
Tres Rios Elementary 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 | 20.4:1 | ▲ 20% | 17:1 | 15.7:1 |
| Free-lunch eligible | 55.9% | ▲ 16% | 48.3% | 51.7% |
| Enrollment | 713 | top 20% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.4:1
Leaner classes than 15% of US schools, heavier class loads than most.
713
Bigger than 81% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
55.9%
free-lunch eligible
- 16% 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
20.4:1
students per teacher
- 20% above state mean
Top 78% in Arizona - lower ratio than 22% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
44.6%
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
$9,585
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
1
in-school suspensions + 39 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 5.6 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 82.9%
African American 10.7%
White 3.1%
Two or More 1.8%
Asian 0.7%
Native Hawaiian / Pacific Islander 0.6%
American Indian / Alaska Native 0.3%
Largest group: Hispanic or Latino at 82.9% of enrollment.
Student-body diversity index 30.0/100
Simpson diversity index - at 30.0, Tres Rios Elementary School is less mixed than the Arizona school average of 47.2.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Littleton Elementary District (4278), which includes Tres Rios Elementary School.
$9,585
Per student
-27%
vs Arizona
Avg $13,145
-42%
vs U.S.
Avg $16,593
Revenue mix
Local 34.0%
State 45.5%
Federal 20.5%
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 Tres Rios Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Quentin Elementary School | Larger | Similar economic need | Similar S:T ratio |
| Country Place Elementary | Larger | Similar economic need | Lower S:T ratio |
| Estrella Vista Elementary School | Larger | Similar economic need | Similar S:T ratio |
| Fine Arts Academy | Similar size | Similar economic need | Higher S:T ratio |
| Littleton Elementary School | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Tres Rios Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 914
- Students per teacher
- 19.9:1
- Resource Index
- 30/100
- Enrollment
- 900
- Students per teacher
- 18.4:1
- Resource Index
- 32/100
- Enrollment
- 893
- Students per teacher
- 19.8:1
- Resource Index
- 30/100
- Enrollment
- 811
- Students per teacher
- 21.9:1
- Resource Index
- 27/100
- Enrollment
- 802
- Students per teacher
- 20.6:1
- Resource Index
- 32/100
Similar elementary schools in Tolleson
1 comparable elementary schools (grades K-5) serving the same city.
Similar elementary 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 (~713 students)
Next steps
Verify locally before acting on Tres Rios Elementary School's federal record.
- Compare Tres Rios Elementary School against another school. Compare schools
- Littleton Elementary District (4278)'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 Tres Rios Elementary School
How many students attend Tres Rios Elementary School?
Tres Rios Elementary School has 713 students enrolled. It is an elementary school in Tolleson, AZ.
What is the student-teacher ratio at Tres Rios Elementary School?
The student-teacher ratio at Tres Rios Elementary School is 20.4:1, which is 20% higher than the Arizona average of 17:1 and 30% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Tres Rios Elementary School?
55.9% of students at Tres Rios Elementary School are eligible for free lunch, compared to the Arizona average of 48.3%.
What is the racial and ethnic makeup of Tres Rios Elementary School?
The largest demographic group at Tres Rios Elementary School is Hispanic or Latino at 82.9% of enrollment, in Tolleson, AZ.
What is the Resource Investment Index for Tres Rios Elementary School?
Tres Rios Elementary School has a Resource Investment Index of 29/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Tres Rios Elementary School rank among elementary schools in Tolleson?
By Resource Investment Index, Tres Rios Elementary School ranks #2 of 6 elementary schools in Tolleson, AZ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Tolleson on the city page.
Is Tres Rios Elementary School a good school?
Tres Rios Elementary School earns 29/100 on the Resource Investment Index, with class sizes larger than 78% 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 Littleton Elementary District (4278)?
Besides Tres Rios Elementary School, Littleton Elementary District (4278) also operates Quentin Elementary School (914 students), Country Place Elementary (900 students), and Estrella Vista Elementary School (893 students). See the Littleton Elementary District (4278) 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.