- Enrollment
- 1,310
- Students per teacher
- 18.5:1
- Resource Index
- 23/100
Other / mixed grade configuration · San Tan Valley, AZ
Copper Basin
Federal NCES profile for Copper Basin, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 37/100.
2024-25 NCES dataOther / mixed grade configurationNCES 040292002436
👥 S:T ratio 40
🌟 Gifted program 70
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Copper Basin earns 37/100 on the Resource Investment Index, with class sizes near the Arizona median.
- #3 of 9
- schools in San Tan Valley · Resource Index
- 37
- Resource Index · Typical
- 15.1:1
- students per teacher
- 45.0%
- free-lunch eligible
Copper Basin has class sizes near the Arizona median. Computed live against every Arizona school reporting to NCES.
By Resource Investment Index, Copper Basin ranks #3 of 9 schools in San Tan Valley, AZ.
School address
District: Florence Unified School District (4437) · Arizona
NCES ID 040292002436 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-82 students YoY
Copper Basin shrank from 640 students in 2022-23 to 558 in 2023-24 (-12.8%).
Teacher FTE added 37.0 → 37.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-82 students YoY 040292002436 · San Tan Valley, AZ Other · MID · TRAD
557 enr · 15.1:1 · 45.0% lunch · RII 37
Nearest enrollment peer: Poston Butte High School (1,310 students)
Copper Basin shrank from 640 students in 2022-23 to 558 in 2023-24 (-12.8%). Teacher FTE added 37.0 → 37.5 across the same CCD years. Read with this school → · District book → · Arizona schools → · Find another →
Copper Basin in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Poston Butte H
Poston Butte High School
1,310 students
- Florence High
Florence High School
857 students
- Florence K-8
Florence K-8
805 students
- San Tan Foothi
San Tan Foothills High School
793 students
- Circle Cross K
Circle Cross K8 Stem Academy
728 students
- This school
Copper Basin
557 students
What this shows Copper Basin reports 557 students on the CCD universe file.
How Copper Basin compares
Copper Basin is a shrinking campus on CCD: ratios and free-lunch share vs Arizona and U.S. means.
| Metric | This school | vs Arizona | Arizona avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.1:1 | ▼ 11% | 17:1 | 15.7:1 |
| Free-lunch eligible | 45.0% | ▼ 7% | 48.3% | 51.7% |
| Enrollment | 557 | top 33% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15.1:1
Leaner classes than 46% of US schools, a middle-of-the-pack class size.
557
Bigger than 68% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
45.0%
free-lunch eligible
- 7% below the Arizona average of 48.3%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
15.1:1
students per teacher
- 11% below state mean
Top 37% in Arizona - lower ratio than 63% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
49.4%
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
$10,483
per pupil, district-wide
- below Arizona avg of $13,502
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
62
in-school suspensions + 41 out-of-school
Suspension rate: 11.1 per 100 students. Combined in-school and out-of-school rate: 18.5 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 47.4%
White 35.9%
African American 7.2%
Two or More 5.2%
American Indian / Alaska Native 2.9%
Native Hawaiian / Pacific Islander 0.9%
Asian 0.5%
Largest group: Hispanic or Latino at 47.4% of enrollment.
Student-body diversity index 63.8/100
Simpson diversity index - at 63.8, Copper Basin is more mixed than the Arizona school average of 47.2.
Programs
Gifted & talented Yes
District finance for Florence Unified School District (4437) reports $10,483 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Copper Basin Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Poston Butte High School | Larger | Lower economic need | Higher S:T ratio |
| Florence High School | Larger | Similar economic need | Higher S:T ratio |
| Florence K-8 | Larger | Similar economic need | Higher S:T ratio |
| San Tan Foothills High School | Larger | Lower economic need | Similar S:T ratio |
| Circle Cross K8 Stem Academy | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Copper Basin's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 857
- Students per teacher
- 20.4:1
- Resource Index
- 16/100
- Enrollment
- 805
- Students per teacher
- 20.6:1
- Resource Index
- 29/100
- Enrollment
- 793
- Students per teacher
- 16.5:1
- Resource Index
- 21/100
- Enrollment
- 728
- Students per teacher
- 17.3:1
- Resource Index
- 41/100
Similar other schools in San Tan Valley
6 comparable other schools (grades Mixed) serving the same city.
American Leadership Academy Ironwood K12
Standard public school
2,084 students
Poston Butte High School
Standard public school
1,310 students 18.5:1 students per teacher
Combs High School
Standard public school
1,182 students 20:1 students per teacher
Walker Butte K-8
Standard public school
718 students 15.6:1 students per teacher
San Tan Heights Elementary
Standard public school
669 students 17.2:1 students per teacher
Skyline Ranch Elementary School
Standard public school
583 students 14.2:1 students per teacher
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~557 students)
Frequently asked questions about Copper Basin
How many students attend Copper Basin?
Copper Basin has 557 students enrolled. It is a public school in San Tan Valley, AZ. CCD year-over-year: 640 (2022-23) → 558 (2023-24), down 82.
What is the student-teacher ratio at Copper Basin?
The student-teacher ratio at Copper Basin is 15.1:1, which is 11% lower than the Arizona average of 17:1 and 4% 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 Copper Basin?
45.0% of students at Copper Basin are eligible for free lunch, compared to the Arizona average of 48.3%.
What is the racial and ethnic makeup of Copper Basin?
The largest demographic group at Copper Basin is Hispanic or Latino at 47.4% of enrollment, in San Tan Valley, AZ. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 63.8/100.
What is the Resource Investment Index for Copper Basin?
Copper Basin has a Resource Investment Index of 37/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Copper Basin rank among schools in San Tan Valley?
By Resource Investment Index, Copper Basin ranks #3 of 9 schools in San Tan Valley, AZ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in San Tan Valley on the city page.
What other schools are in Florence Unified School District (4437)?
Besides Copper Basin, Florence Unified School District (4437) also operates Poston Butte High School (1,310 students), Florence High School (857 students), and Florence K-8 (805 students). See the Florence Unified School District (4437) district page for the complete list.