Enrollment
291
Texas · 2024-25 NCES data
Other / mixed grade configuration · Harlingen, TX
Horizon Montessori Iii - Stem Academy
Federal NCES profile for Horizon Montessori Iii - Stem Academy, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 52/100.
2024-25 NCES dataOther / mixed grade configurationNCES 480006512111Charter school
👥 S:T ratio 55
🌟 Gifted program 70
🎓 Counselors 42
📋 Attendance 41
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Horizon Montessori Iii - Stem Academy earns 52/100 on the Resource Investment Index, with class sizes smaller than 83% of Texas schools. It is also less racially and ethnically mixed than most Texas schools.
- #4 of 21
- schools in Harlingen · Resource Index
- 52
- Resource Index · Higher
- 11.2:1
- small classes for Texas
- 66.5%
- free-lunch eligible
Horizon Montessori Iii - Stem Academy has class sizes smaller than 83% of Texas schools. Computed live against every Texas school reporting to NCES.
By Resource Investment Index, Horizon Montessori Iii - Stem Academy ranks #4 of 21 schools in Harlingen, TX.
School address
District: Horizon Montessori Public Schools · Texas
NCES ID 480006512111 Verify on NCES CCD record →
Teachers (FTE)
26.0
Federal CCD staff survey
Students per teacher
11.2:1
vs 14.7:1 Texas avg
-24% vs state
Free-lunch eligible
66.5%
vs 61.9% Texas avg
+7% vs state
Student-teacher ratio in context
How Horizon Montessori Iii - Stem Academy compares with Texas and U.S. medians
What stands out at Horizon Montessori Iii - Stem Academy
Horizon Montessori Iii - Stem Academy is a higher-need, mid-sized charter combined-grade school in Harlingen, Texas, enrolling 291 students.
Class sizes run a bit leaner than typical: 11.2:1 puts it in the smaller third of Texas schools by student-teacher ratio.
Its free-meal eligibility rate of 66.5% lands close to the Texas typical range, neither a high- nor low-need campus by this measure.
Enrollment of 291 puts it in the smaller third of Texas schools by headcount.
Its Resource Investment Index lands in the upper third of 8,960 scored Texas schools.
Against 850 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #280.
Its student body is predominantly Hispanic or Latino (94% of enrollment), among the less diverse in the state (diversity index 12/100).
Counselor coverage runs a bit thin, about 291 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 23.7% of students chronically absent per the 2021-22 civil-rights collection.
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.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Horizon Montessori Public Schools also operates Horizon Montessori - Stem Academy (331 students) and Horizon Montessori Ii - Stem Academy (326 students) alongside Horizon Montessori Iii - 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 Iii - Stem Academy compares
Horizon Montessori Iii - 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 | 11.2:1 | ▼ 24% | 14.7:1 | 15.7:1 |
| Free-lunch eligible | 66.5% | ▲ 7% | 61.9% | 51.7% |
| Enrollment | 291 | top 76% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.2:1
Leaner classes than 82% of US schools, among the more generously staffed nationally.
291
Bigger than 31% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
66.5%
free-lunch eligible
- 7% 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
11.2:1
students per teacher
- 24% below state mean
Top 17% in Texas - lower ratio than 83% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
23.7%
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
$10,302
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
Counselors1.0 FTE
Per 291 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 2 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 93.8%
White 4.1%
Asian 2.1%
Largest group: Hispanic or Latino at 93.8% of enrollment.
Student-body diversity index 11.8/100
Simpson diversity index - at 11.8, Horizon Montessori Iii - Stem Academy is less mixed than the Texas school average of 44.7.
Programs
AP courses offered 1
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Horizon Montessori Public Schools, which includes Horizon Montessori Iii - 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 Iii - Stem Academy Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Horizon Montessori - Stem Academy | Similar size | Higher economic need | Similar S:T ratio |
| Horizon Montessori Ii - Stem Academy | Similar size | Similar economic need | Higher S:T ratio |
| Horizon Montessori Pearland - Stem Academy | Smaller | Similar economic need | Similar S:T ratio |
Comparisons are relative to Horizon Montessori Iii - Stem Academy's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 331
- Students per teacher
- 12.3:1
- Resource Index
- 59/100
- Enrollment
- 326
- Students per teacher
- 13:1
- Resource Index
- 46/100
- 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 (~291 students)
Similar student-teacher ratio (~11.2:1)
Next steps
Verify locally before acting on Horizon Montessori Iii - Stem Academy's federal record.
- Compare Horizon Montessori Iii - 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 Iii - Stem Academy
How many students attend Horizon Montessori Iii - Stem Academy?
Horizon Montessori Iii - Stem Academy has 291 students enrolled. It is a public school in Harlingen, TX.
What is the student-teacher ratio at Horizon Montessori Iii - Stem Academy?
The student-teacher ratio at Horizon Montessori Iii - Stem Academy is 11.2:1, which is 24% lower than the Texas average of 14.7:1 and 29% 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 Iii - Stem Academy?
66.5% of students at Horizon Montessori Iii - 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 Iii - Stem Academy?
The largest demographic group at Horizon Montessori Iii - Stem Academy is Hispanic or Latino at 93.8% of enrollment, in Harlingen, TX.
What is the Resource Investment Index for Horizon Montessori Iii - Stem Academy?
Horizon Montessori Iii - Stem Academy has a Resource Investment Index of 52/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Horizon Montessori Iii - Stem Academy rank among schools in Harlingen?
By Resource Investment Index, Horizon Montessori Iii - Stem Academy ranks #4 of 21 schools in Harlingen, TX. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Harlingen on the city page.
Is Horizon Montessori Iii - Stem Academy a good school?
Horizon Montessori Iii - Stem Academy earns 52/100 on the Resource Investment Index, with class sizes smaller than 83% 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 Iii - Stem Academy, Horizon Montessori Public Schools also operates Horizon Montessori - Stem Academy (331 students), Horizon Montessori Ii - Stem Academy (326 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.