Enrollment
331
Elementary
DISTRICT 291 · STATE 519
SCHOOL COMMUNITY·HORIZON MONTESSORI PUBLIC SCHOOLS·NCES 480006510814
Horizon Montessori - STEM Academy
320 N MAIN ST, MCALLEN, TX 78501 · (956) 631-0234 · Hidalgo County
GRADES PK–08ELEMENTARY12-CITYCHARTERTITLE IREGULAR SCHOOL331 STUDENTS
B+
allk12 Grade
Scored higher than 65% of Texas public elementary schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- A-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- DThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Texas public elementary schools
Student : Teacher
15.2:1
22 FTE teachers
DISTRICT 15.1:1 · STATE 15.1:1
Free / Reduced Lunch
81%
269 students
DISTRICT 75% · STATE 65%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Pre-K | 63 | 19% |
| Kindergarten | 34 | 10% |
| Grade 1 | 31 | 9% |
| Grade 2 | 29 | 9% |
| Grade 3 | 40 | 12% |
| Grade 4 | 36 | 11% |
| Grade 5 | 33 | 10% |
| Grade 6 | 28 | 8% |
| Grade 7 | 22 | 7% |
| Grade 8 | 15 | 5% |
This year's kindergarten class (34) is 127% larger than its 8th grade class (15).
Student demographics
5%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 25% · STATE 63% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
QUIET COMMUNITY
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START A DISCUSSIONTest scores
STAAR 2025-26 . % Meets Grade Level or AboveReading
61.0%
TX avg 54.5% . +22.0pp since 2020
Mathematics
38.0%
TX avg 45.3% . +17.0pp since 2020
What this means: On the STAAR, Texas's statewide test, about 61 of every 100 students at this school read at grade level and about 38 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are up about 22 points since 2020, while math scores are up about 17 points.
Performance levels, 2025-26
| Subject | Masters Grade Level | Meets Grade Level | Approaches Grade Level | Did Not Meet Grade Level |
|---|---|---|---|---|
| Reading | 26.0% | 35.0% | 19.0% | 20.0% |
| Mathematics | 11.0% | 27.0% | 32.0% | 30.0% |
Share of tested students at each STAAR level. Each student counts in one level, so a row adds to about 100%.
STAAR results by year
| School year | Reading | Mathematics |
|---|---|---|
| 2025-26 | 61.0% | 38.0% |
| 2024-25 | 60.0% | 41.0% |
| 2023-24 | 65.0% | 49.0% |
| 2022-23 | 68.0% | 53.0% |
| 2021-22 | 63.0% | 33.0% |
| 2020-21 | 39.0% | 21.0% |
% Meets Grade Level or Above, all students and all tested grades.
Source: STAAR. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
48.2%
composite math + reading, all grades
Predicted
39.0%
based on TX schools with similar FRL share
Beats by
+9.2pp
above demographic expectation
What this means: About 48% of students here test proficient in math and reading, compared with the roughly 39% typical for Texas schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Texas's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Horizon Montessori - STEM Academy
Horizon Montessori - STEM Academy's state test result (48.2% proficient) is higher than 5 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Horizon Montessori - STEM Academy this school | 331 | 81.3% | 48.2% |
| Pete Gallego Elementary School EAGLE PASS | 327 | 81.0% | 45.3% |
| Hilda C Escobar/Alicia C Rios Elementary School MISSION | 345 | 82.6% | 38.1% |
| Horizon Montessori II - STEM Academy WESLACO | 326 | 82.8% | 33.6% |
| Anthony Elementary School ANTHONY | 312 | 80.1% | 29.5% |
| West Central Elementary School HEREFORD | 331 | 81.3% | 32.4% |
Matched among Texas elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Horizon Montessori - STEM Academy ranks
Among elementary schools| Measure | This school | In Texas | In Hidalgo County |
|---|---|---|---|
| State test proficiency ranked highest first | 48.2% | #1,609 of 4,401 | #67 of 181 |
| Math proficiency ranked highest first | 38.0% | #3,039 of 4,466 ▼ 527 | #149 of 183 ▼ 39 |
| Reading proficiency ranked highest first | 61.0% | #1,304 of 4,466 ▲ 78 | #38 of 183 ▲ 5 |
| 3-year test score change ranked biggest drop first | -11.0pp | #287 of 3,998 | #4 of 180 |
| Enrollment ranked largest first | 331 | #4,002 of 4,938 | #174 of 192 |
| Students per teacher ranked fewest first | 15.2:1 | #2,658 of 4,622 | #67 of 185 |
| Diversity index ranked most diverse first | 5.3% | #4,305 of 4,628 | #59 of 185 |
| Free and reduced lunch ranked highest share first | 81.3% | #1,848 of 4,789 | #156 of 190 |
| Enrollment change since 2017-18 ranked steepest decline first | -43.9% | #115 of 2,838 | #4 of 128 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
331
-73 (-18%) vs 2020
-17% since 2010-11, when it was 401
Student : Teacher
15.2:1
was 15.5:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 331 | 21.7 | 15.2:1 | 81% (269) |
| 2023-24 | 342 | 26.4 | 13.0:1 | 79% (270) |
| 2022-23 | 381 | 27.6 | 13.8:1 | 81% (307) |
| 2020-21 | 404 | 26 | 15.5:1 | 75% (301) |
| 2017-18 | 590 | 38.9 | 15.2:1 | 78% (463) |
| 2015-16 | 681 | 37 | 18.4:1 | 66% (449) |
| 2010-11 | 401 | 22 | 18.2:1 | 63% (252) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Horizon Montessori - STEM Academy.
Since 2017-18: students down 44% (590 to 331); teachers down 44% (38.9 to 21.7).
About Horizon Montessori - STEM Academy
Horizon Montessori - STEM Academy, located in MCALLEN, Texas, is a small elementary school. The school's enrollment of 331 students covers pre-K through 8. Enrollment is 36% lower than the average for elementary schools in Texas, which is about 519.
Horizon Montessori - STEM Academy is in HORIZON MONTESSORI PUBLIC SCHOOLS, a district with 1,164 students across 4 schools.
Most students at Horizon Montessori - STEM Academy are Hispanic: 97% of enrollment. Horizon Montessori - STEM Academy has a diversity index of 5%, compared with 70% for all US public school students.
The school's student-to-teacher ratio is about 15.2:1, with 21.7 full-time-equivalent teachers. Elementary schools in Texas have a similar average ratio of 15.1:1. Students eligible for free or reduced-price lunch make up 81% of enrollment.
Horizon Montessori - STEM Academy is graded B+ by allk12, scoring above 65% of Texas public elementary schools once test results, poverty-adjusted performance, and the recent trend are combined.
Given its share of students eligible for free or reduced-price lunch, Horizon Montessori - STEM Academy would be expected to post about 39.0%. Its actual average proficiency rate on state tests is 48.2%.
County data help place the school in context: in Hidalgo County, median household income is about $54,338, the share of adults with a bachelor's degree or higher is 21%, and roughly 23% of residents are in poverty. Horizon Montessori - STEM Academy is among the 364 public schools in Hidalgo County.
Nearby, Triumph Public High Schools-McAllen is about 0.2 miles away. Horizon Montessori - STEM Academy is one of several public schools in the area, with at least 8 others within five miles. Nearby schools average 47.1% on proficiency, and Horizon Montessori - STEM Academy is above that at 48.2%.
The federal government classifies Horizon Montessori - STEM Academy's location as City: Mid-size. Charter status: Horizon Montessori - STEM Academy is a public charter school.
Enrollment was 404 in 2020-21 and 331 in 2024-25, a decrease of 73 students.
Topics for discussion here include school safety, transportation, and start times. Anyone with firsthand experience at this school can post or comment.
Hidalgo County at a glance
View full county profilePopulation
891,977
Census ACS
Median income
$54,338
Household, ACS
Bachelor's+
21%
Adults 25+
Poverty rate
23%
Below federal line
Schools in county
364
212,859 students
Quick facts
Related schools
Other schools in HORIZON MONTESSORI PUBLIC SCHOOLS
- Horizon Montessori II - STEM AcademyElementary · 326 students
- Horizon Montessori III - STEM AcademyElementary · 291 students
- Horizon Montessori Pearland - STEM AcademyElementary · 216 students
- Horizon H S HarlingenCombined
- Horizon H S McAllenCombined
- Horizon H S WeslacoCombined
Other schools in MCALLEN
- McAllen High SchoolHigh · 2,134 students
- Memorial High SchoolHigh · 2,021 students
- Morris Middle SchoolMiddle · 999 students
- Cathey Middle SchoolMiddle · 827 students
- IDEA McAllen College PreparatoryHigh · 820 students
- Gonzalez Elementary SchoolElementary · 818 students
Nearby schools
- Triumph Public High Schools-McAllen0.2 mi · 118
- Wilson Elementary School0.4 mi · 408
- Lamar Academy0.5 mi · 47
- Fields Elementary School0.7 mi · 443
- Travis Middle School0.9 mi · 505
- Alvarez Elementary School1.1 mi · 435
Frequently asked questions
About Horizon Montessori - STEM AcademyHow large is Horizon Montessori - STEM Academy?
Horizon Montessori - STEM Academy enrolls approximately 331 students in grades PK-08.
What grades does Horizon Montessori - STEM Academy serve?
Horizon Montessori - STEM Academy serves grades PK-08.
What is the student-teacher ratio at Horizon Montessori - STEM Academy?
The student-to-teacher ratio at Horizon Montessori - STEM Academy is approximately 15.2:1 (22 FTE teachers).
How diverse is Horizon Montessori - STEM Academy?
Horizon Montessori - STEM Academy reports a student body of 2% White, 97% Hispanic, 0% Two or more.
What district is Horizon Montessori - STEM Academy in?
Horizon Montessori - STEM Academy is part of HORIZON MONTESSORI PUBLIC SCHOOLS.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.