Enrollment
331
Texas · 2024-25 NCES data
Other / mixed grade configuration · Mcallen, TX
Horizon Montessori - Stem Academy
Federal NCES profile for Horizon Montessori - Stem Academy, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 59/100.
2024-25 NCES dataOther / mixed grade configurationNCES 480006510814Charter school
👥 S:T ratio 51
🌟 Gifted program 70
📋 Attendance 56
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Horizon Montessori - Stem Academy earns 59/100 on the Resource Investment Index, with class sizes smaller than 74% of Texas schools. It is also less racially and ethnically mixed than most Texas schools.
- #2 of 31
- schools in Mcallen · Resource Index
- 59
- Resource Index · Higher
- 12.3:1
- small classes for Texas
- 77.7%
- free-lunch eligible
Horizon Montessori - Stem Academy has class sizes smaller than 74% of Texas schools. Computed live against every Texas school reporting to NCES.
By Resource Investment Index, Horizon Montessori - Stem Academy ranks #2 of 31 schools in Mcallen, TX.
School address
District: Horizon Montessori Public Schools · Texas
NCES ID 480006510814 Verify on NCES CCD record →
Teachers (FTE)
27.0
Federal CCD staff survey
Students per teacher
12.3:1
vs 14.7:1 Texas avg
-16% vs state
Free-lunch eligible
77.7%
vs 61.9% Texas avg
+26% vs state
Student-teacher ratio in context
How Horizon Montessori - Stem Academy compares with Texas and U.S. medians
What stands out at Horizon Montessori - Stem Academy
Horizon Montessori - Stem Academy is a high-poverty, mid-sized charter combined-grade school in Mcallen, Texas, enrolling 331 students.
Class sizes run a bit leaner than typical: 12.3:1 puts it in the smaller third of Texas schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 77.7% of students eligible for free meals.
Enrollment of 331 puts it in the smaller third of Texas schools by headcount.
Its Resource Investment Index outscores 90% of the 8,960 Texas schools with a score on record, a top-tier result on this measure.
Among 1,223 similarly sized, similarly resourced-need Texas schools statewide, it ranks #55, a top-tier result once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (97% of enrollment), among the less diverse in the state (diversity index 5/100).
17.5% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Horizon Montessori Public Schools spends $10,302 per pupil, 24% below the Texas average, a leaner-resourced district than most.
Its district draws 24.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Horizon Montessori Public Schools also operates Horizon Montessori Ii - Stem Academy (326 students) and Horizon Montessori Iii - Stem Academy (291 students) alongside Horizon Montessori - Stem Academy.
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 Horizon Montessori - Stem Academy compares
Horizon Montessori - Stem Academy on the metrics families compare, against Texas and U.S. means.
| Metric | This school | vs Texas | Texas avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.3:1 | ▼ 16% | 14.7:1 | 15.7:1 |
| Free-lunch eligible | 77.7% | ▲ 26% | 61.9% | 51.7% |
| Enrollment | 331 | top 72% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.3:1
Leaner classes than 73% of US schools, among the more generously staffed nationally.
331
Bigger than 37% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
77.7%
free-lunch eligible
- 26% above the Texas average of 61.9%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
12.3:1
students per teacher
- 16% below state mean
Top 26% in Texas - lower ratio than 74% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
17.5%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$10,302
per pupil, district-wide
- below Texas avg of $13,644
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
4
in-school suspensions + 5 out-of-school
Suspension rate: 1.2 per 100 students. Combined in-school and out-of-school rate: 2.7 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 97.3%
White 1.8%
American Indian / Alaska Native 0.6%
Two or More 0.3%
Largest group: Hispanic or Latino at 97.3% of enrollment.
Student-body diversity index 5.3/100
Simpson diversity index - at 5.3, Horizon Montessori - Stem Academy is less mixed than the Texas school average of 44.7.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Horizon Montessori Public Schools, which includes Horizon Montessori - Stem Academy.
$10,302
Per student
-24%
vs Texas
Avg $13,644
-38%
vs U.S.
Avg $16,593
Revenue mix
Local 1.3%
State 74.4%
Federal 24.2%
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 Horizon Montessori - Stem Academy Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Horizon Montessori Ii - Stem Academy | Similar size | Similar economic need | Similar S:T ratio |
| Horizon Montessori Iii - Stem Academy | Similar size | Lower economic need | Similar S:T ratio |
| Horizon Montessori Pearland - Stem Academy | Smaller | Lower economic need | Lower S:T ratio |
Comparisons are relative to Horizon Montessori - Stem Academy's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 326
- Students per teacher
- 13:1
- Resource Index
- 46/100
- Enrollment
- 291
- Students per teacher
- 11.2:1
- Resource Index
- 52/100
- Enrollment
- 216
- Students per teacher
- 10.8:1
- Resource Index
- 52/100
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Texas, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~331 students)
Similar student-teacher ratio (~12.3:1)
Next steps
Verify locally before acting on Horizon Montessori - Stem Academy's federal record.
- Compare Horizon Montessori - Stem Academy against another school. Compare schools
- Horizon Montessori Public Schools'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 Horizon Montessori - Stem Academy
How many students attend Horizon Montessori - Stem Academy?
Horizon Montessori - Stem Academy has 331 students enrolled. It is a public school in Mcallen, TX.
What is the student-teacher ratio at Horizon Montessori - Stem Academy?
The student-teacher ratio at Horizon Montessori - Stem Academy is 12.3:1, which is 16% lower than the Texas average of 14.7:1 and 22% 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 Horizon Montessori - Stem Academy?
77.7% of students at Horizon Montessori - Stem Academy are eligible for free lunch, compared to the Texas average of 61.9%.
What is the racial and ethnic makeup of Horizon Montessori - Stem Academy?
The largest demographic group at Horizon Montessori - Stem Academy is Hispanic or Latino at 97.3% of enrollment, in Mcallen, TX.
What is the Resource Investment Index for Horizon Montessori - Stem Academy?
Horizon Montessori - Stem Academy has a Resource Investment Index of 59/100 (higher 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 Horizon Montessori - Stem Academy rank among schools in Mcallen?
By Resource Investment Index, Horizon Montessori - Stem Academy ranks #2 of 31 schools in Mcallen, TX. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Mcallen on the city page.
Is Horizon Montessori - Stem Academy a good school?
Horizon Montessori - Stem Academy earns 59/100 on the Resource Investment Index, with class sizes smaller than 74% of Texas schools. It is also less racially and ethnically mixed than most Texas 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 Horizon Montessori Public Schools?
Besides Horizon Montessori - Stem Academy, Horizon Montessori Public Schools also operates Horizon Montessori Ii - Stem Academy (326 students), Horizon Montessori Iii - Stem Academy (291 students), and Horizon Montessori Pearland - Stem Academy (216 students). See the Horizon Montessori Public Schools 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.