Enrollment
291
Elementary
DISTRICT 291 · STATE 519
SCHOOL COMMUNITY·HORIZON MONTESSORI PUBLIC SCHOOLS·NCES 480006512111
Horizon Montessori III - STEM Academy
2802 S 77 SUNSHINE STRIP, HARLINGEN, TX 78550 · (956) 423-8200 · Cameron County
GRADES PK–08ELEMENTARY13-CITYCHARTERTITLE IREGULAR SCHOOL291 STUDENTS
C
allk12 Grade
Scored higher than 25% of Texas public elementary schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- CThree-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
15.1:1
19 FTE teachers
DISTRICT 15.1:1 · STATE 15.1:1
Free / Reduced Lunch
71%
206 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 | 66 | 23% |
| Kindergarten | 34 | 12% |
| Grade 1 | 31 | 11% |
| Grade 2 | 27 | 9% |
| Grade 3 | 38 | 13% |
| Grade 4 | 21 | 7% |
| Grade 5 | 28 | 10% |
| Grade 6 | 7 | 2% |
| Grade 7 | 17 | 6% |
| Grade 8 | 22 | 8% |
This year's kindergarten class (34) is 55% larger than its 8th grade class (22).
Student demographics
12%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
49.0%
TX avg 54.5% . +19.0pp since 2020
Mathematics
42.0%
TX avg 45.3% . +22.0pp since 2020
What this means: On the STAAR, Texas's statewide test, about 49 of every 100 students at this school read at grade level and about 42 of 100 do math at grade level. Across all Texas schools, those numbers are about 55 and 45. Reading scores are up about 19 points since 2020, while math scores are up about 22 points.
Performance levels, 2025-26
| Subject | Masters Grade Level | Meets Grade Level | Approaches Grade Level | Did Not Meet Grade Level |
|---|---|---|---|---|
| Reading | 19.0% | 30.0% | 27.0% | 24.0% |
| Mathematics | 15.0% | 27.0% | 22.0% | 36.0% |
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 | 49.0% | 42.0% |
| 2024-25 | 52.0% | 32.0% |
| 2023-24 | 46.0% | 35.0% |
| 2022-23 | 59.0% | 36.0% |
| 2021-22 | 35.0% | 35.0% |
| 2020-21 | 30.0% | 20.0% |
% 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
37.2%
composite math + reading, all grades
Predicted
43.5%
based on TX schools with similar FRL share
Beats by
-6.3pp
below demographic expectation
What this means: About 37% of students here test proficient in math and reading, compared with the roughly 43% 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 III - STEM Academy
Horizon Montessori III - STEM Academy's state test result (37.2% proficient) is higher than 1 of the 3 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Horizon Montessori III - STEM Academy this school | 291 | 70.8% | 37.2% |
| Parkland Pre K Center EL PASO | 308 | 73.1% | N/A |
| Brewster Elementary School EDINBURG | 332 | 69.3% | 56.8% |
| Dr Green Elementary School EL PASO | 264 | 69.7% | 39.9% |
| The Varnett School - East HOUSTON | 275 | 73.1% | 28.4% |
| Natalia Early Child Center NATALIA | 283 | 72.4% | N/A |
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 III - STEM Academy ranks
Among elementary schools| Measure | This school | In Texas | In Cameron County |
|---|---|---|---|
| State test proficiency ranked highest first | 37.2% | #2,923 of 4,401 | #79 of 93 |
| Math proficiency ranked highest first | 42.0% | #2,575 of 4,466 ▲ 944 | #74 of 93 ▲ 9 |
| Reading proficiency ranked highest first | 49.0% | #2,582 of 4,466 ▼ 390 | #63 of 93 ▼ 9 |
| 3-year test score change ranked biggest drop first | -2.0pp | #941 of 3,998 | #16 of 93 |
| Enrollment ranked largest first | 291 | #4,249 of 4,938 | #85 of 95 |
| Students per teacher ranked fewest first | 15.1:1 | #2,494 of 4,622 | #34 of 93 |
| Diversity index ranked most diverse first | 11.8% | #4,040 of 4,628 | #10 of 93 |
| Free and reduced lunch ranked highest share first | 70.8% | #2,516 of 4,789 | #85 of 94 |
| Enrollment change since 2017-18 ranked steepest decline first | -14.7% | #1,618 of 2,838 | #42 of 64 |
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
291
-50 (-15%) vs 2020
+102% since 2010-11, when it was 144
Student : Teacher
15.1:1
was 14.2:1
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 | 291 | 19.3 | 15.1:1 | 71% (206) |
| 2023-24 | 334 | 23.5 | 14.2:1 | 77% (257) |
| 2022-23 | 343 | 26.7 | 12.8:1 | 69% (238) |
| 2020-21 | 341 | 24 | 14.2:1 | 73% (249) |
| 2017-18 | 341 | 22 | 15.5:1 | 71% (243) |
| 2015-16 | 287 | 18 | 15.9:1 | 79% (227) |
| 2010-11 | 144 | 8 | 18.0:1 | 86% (124) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Horizon Montessori III - STEM Academy.
Since 2017-18: students down 15% (341 to 291); teachers down 12% (22 to 19.3).
About Horizon Montessori III - STEM Academy
Horizon Montessori III - STEM Academy is a small elementary school in HARLINGEN, Texas. The school reports 291 students in pre-K through 8. The typical figure for elementary schools in Texas is about 519 students.
Horizon Montessori III - STEM Academy is in HORIZON MONTESSORI PUBLIC SCHOOLS, a district with 1,164 students across 4 schools.
Federal enrollment data show Horizon Montessori III - STEM Academy is 94% Hispanic. Enrollment also includes 4% White and 2% Asian. Horizon Montessori III - STEM Academy's diversity index is 12%, against a US figure of 70%.
The school employs the equivalent of 19.3 full-time teachers, for a ratio of 15.1:1. That matches the 15.1:1 average for elementary schools in Texas fairly closely. The free or reduced-price lunch rate at Horizon Montessori III - STEM Academy is 71%. On average, public schools in Cameron County report 84%.
Horizon Montessori III - STEM Academy is graded C by allk12, scoring above 25% of Texas public elementary schools once test results, poverty-adjusted performance, and the recent trend are combined.
The BeatsExpectations prediction for Horizon Montessori III - STEM Academy is 43.5%, and its average proficiency rate on state tests is 37.2%.
Across Cameron County, the median household income is $52,601, the share of adults with a bachelor's degree or higher is 22%, and about 21% of people live in poverty. In all, Cameron County has 187 public schools and roughly 97,392 students.
Harlingen Collegiate High School is located about 0.3 miles from Horizon Montessori III - STEM Academy. The five-mile area around Horizon Montessori III - STEM Academy holds at least 8 other public schools.
NCES lists the school's locale as City: Small. That means it sits inside a principal city with a population under 100,000. Horizon Montessori III - STEM Academy is a publicly funded charter school.
Enrollment has fallen by 50 students since 2020-21, to 291.
The allk12 site hosts a discussion page for Horizon Montessori III - STEM Academy covering things like sports schedules, lunch menus, and spirit week. Posting is open to anyone connected to the school.
Cameron County at a glance
View full county profilePopulation
426,120
Census ACS
Median income
$52,601
Household, ACS
Bachelor's+
22%
Adults 25+
Poverty rate
21%
Below federal line
Schools in county
187
97,392 students
Quick facts
Related schools
Other schools in HORIZON MONTESSORI PUBLIC SCHOOLS
- Horizon Montessori - STEM AcademyElementary · 331 students
- Horizon Montessori II - STEM AcademyElementary · 326 students
- Horizon Montessori Pearland - STEM AcademyElementary · 216 students
- Horizon H S HarlingenCombined
- Horizon H S McAllenCombined
- Horizon H S WeslacoCombined
Other schools in HARLINGEN
- Harlingen High SchoolHigh · 2,433 students
- Harlingen H S - SouthHigh · 2,019 students
- Dr Abraham P Cano Freshman AcademyCombined · 1,035 students
- Moises Vela Middle SchoolMiddle · 761 students
- Treasure Hills Elementary SchoolElementary · 758 students
- Gutierrez Middle SchoolMiddle · 747 students
Nearby schools
- Harlingen Collegiate High School0.3 mi · 353
- Treasure Hills Elementary School0.6 mi · 758
- Cameron Co J J Alternative Education Program0.7 mi · 1
- Cameron Co J J Alternative Education Program0.7 mi · 8
- Cameron Co J J Alternative Education Program0.7 mi · 6
- Cameron County JJAEP0.7 mi · 1
Frequently asked questions
About Horizon Montessori III - STEM AcademyWhat is the total enrollment at Horizon Montessori III - STEM Academy?
Horizon Montessori III - STEM Academy enrolls approximately 291 students in grades PK-08.
What grades does Horizon Montessori III - STEM Academy serve?
Horizon Montessori III - STEM Academy serves grades PK-08.
How many teachers does Horizon Montessori III - STEM Academy have?
Horizon Montessori III - STEM Academy employs 19 FTE teachers, for a student-to-teacher ratio of 15.1:1.
What is the student diversity at Horizon Montessori III - STEM Academy?
Student demographics at Horizon Montessori III - STEM Academy are roughly 4% White, 94% Hispanic, 2% Asian.
What district is Horizon Montessori III - STEM Academy in?
Horizon Montessori III - 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.