Enrollment
1,100
Oklahoma · 2024-25 NCES data
Middle school (grades 6-8) · Broken Arrow, OK
Federal NCES profile for Union 8th Grade Ctr, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 26/100.
The verdict
Union 8th Grade Ctr earns 26/100 on the Resource Investment Index, with class sizes larger than 76% of Oklahoma schools. It is also one of the largest schools in Oklahoma.
Union 8th Grade Ctr has class sizes larger than 76% of Oklahoma schools. Computed live against every Oklahoma school reporting to NCES.
By Resource Investment Index, Union 8th Grade Ctr ranks #6 of 6 middle schools in Broken Arrow, OK.
Enrollment
1,100
Oklahoma · 2024-25 NCES data
Teachers (FTE)
61.0
Federal CCD staff survey
Students per teacher
18:1
vs 16.1:1 Oklahoma avg
+12% vs state
How Union 8th Grade Ctr compares with Oklahoma and U.S. medians
Slightly above state median
18:1 - 1.9 above the Oklahoma state median of 16.1:1, indicating larger average class loads than typical schools in the state.
Union 8th Grade Ctr is a large middle school in Broken Arrow, Oklahoma, enrolling 1,100 students.
Class loads run somewhat heavier than typical: 18:1 puts it in the larger third of Oklahoma schools by student-teacher ratio.
By headcount it is one of the larger campuses in Oklahoma, bigger than 97% of state schools at 1,100 students.
Its Resource Investment Index trails 98% of the 1,778 Oklahoma schools with a score on record, one of the lower results on this measure.
Its student body is led by Hispanic or Latino (42%) and White (23%) (diversity index 73/100).
Counselor access is stretched at roughly 553 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 37.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Broken Arrow's middle schools, it stands alongside Centennial Ms (1,060 students): Union 8th Grade Ctr is larger than that campus by headcount and runs leaner classes (18:1 vs 18.6:1).
Union also operates Union Hs (3,569 students) and Union 6th-7th Grade Ctr (2,123 students) alongside Union 8th Grade Ctr.
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
Union 8th Grade Ctr on the metrics families compare, against Oklahoma and U.S. means.
| Metric | This school | vs Oklahoma | Oklahoma avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18:1 | ▲ 12% | 16.1:1 | 15.7:1 |
| Enrollment | 1,100 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
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.
Largest group: Hispanic or Latino at 41.9% of enrollment.
Simpson diversity index - at 73.4, Union 8th Grade Ctr is more mixed than the Oklahoma school average of 59.6.
District-wide per-pupil expenditure for Union, which includes Union 8th Grade Ctr.
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.
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Union Hs | Larger | No free-lunch data | Higher S:T ratio |
| Union 6th-7th Grade Ctr | Larger | No free-lunch data | Lower S:T ratio |
| Union Hs Freshman Academy | Similar size | No free-lunch data | Similar S:T ratio |
| Ellen Ochoa Es | Similar size | No free-lunch data | Lower S:T ratio |
| Rosa Parks Es | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Union 8th Grade Ctr's own figures; each column derives from NCES Common Core of Data.
5 comparable middle schools (grades 6-8) serving the same city.
Matched by enrollment size and by staffing ratio across all of Oklahoma, not just this city - a different peer set than the local comparisons above.
Next steps
Verify locally before acting on Union 8th Grade Ctr's federal record.
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.
Union 8th Grade Ctr has 1,100 students enrolled. It is a middle school in Broken Arrow, OK.
The student-teacher ratio at Union 8th Grade Ctr is 18:1, which is 12% higher than the Oklahoma average of 16.1:1 and 15% higher than the national average of 15.7:1.
The largest demographic group at Union 8th Grade Ctr is Hispanic or Latino at 41.9% of enrollment, in Broken Arrow, OK. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 73.4/100.
Union 8th Grade Ctr has a Resource Investment Index of 26/100 (lower 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).
By Resource Investment Index, Union 8th Grade Ctr ranks #6 of 6 middle schools in Broken Arrow, OK. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Broken Arrow on the city page.
Union 8th Grade Ctr earns 26/100 on the Resource Investment Index, with class sizes larger than 76% of Oklahoma schools. It is also one of the largest schools in Oklahoma. 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.
Besides Union 8th Grade Ctr, Union also operates Union Hs (3,569 students), Union 6th-7th Grade Ctr (2,123 students), and Union Hs Freshman Academy (1,242 students). See the Union district page for the complete list.
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.
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Last updated:
PlainSchools, “Union 8th Grade Ctr, Broken Arrow OK.” Compiled from NCES Common Core of Data, Civil Rights Data Collection, and the NCES F-33 finance survey; data as of June 2026. https://plainschools.com/schools/union-8th-grade-ctr-ok
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