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Horizon Montessori III - Stem Academy

Q: Is Horizon Montessori III - Stem Academy a good school?

Horizon Montessori III - Stem Academy ranks 2700 th of 4627 Texas elementary schools. SchoolDigger rates this school 2 stars out of 5.

Public, Charter Grades PK, KG-8

2700^th

SchoolDigger Rank ?

of 4,627 Texas Elementary Schools

Better than 42% of Texas elementary schools

Summary

Horizon Montessori III - Stem Academy is a public charter school in Harlingen, TX, serving 291 students in grades PK-8, and stands out for offering a middle school program that nearby elementary schools do not. The school, part of the Horizon Montessori Public Schools district, serves a predominantly low-income population, with about 71% of students eligible for free or reduced lunch. Its most impressive feature is the exceptional performance of its 8th graders on high school-level End-of-Course exams: 87.5% were proficient in English I Reading and 62.5% in Algebra I, far exceeding both district and state averages. This shows the school effectively accelerates top students into advanced coursework, a clear advantage over nearby PK-5 schools like Treasure Hills Elementary.

Despite lower spending per student ($8,208) compared to nearby Harlingen Consolidated Independent School District schools (which spend $9,212 to $11,465), Horizon Montessori III remains competitive. For example, it outperformed Treasure Hills in 3rd-grade Math (50% vs. 34.21%) and 4th-grade Reading (37.93% vs. 56.36%), though Treasure Hills has a slightly higher overall rank. The school also shows strong results for its low socioeconomic status students, ranking in the 59th percentile, which is better than its overall 42nd percentile rank. However, performance varies significantly by grade and subject—5th-grade Reading (61.11%) is strong, while 4th-grade Reading (37.93%) and 6th-grade Math (33.33%) lag behind state averages.

One concern is the school's inconsistent performance over time. After a dip in 2023-2024, it rebounded in 2025-2026, with 8th-grade Social Studies jumping from 14.29% to 37.5% proficient. Additionally, support for special education students fluctuates wildly—ranking in the 74th percentile one year and the 27th the next. While the school is cost-effective and excels in advanced courses, parents should be aware of these year-to-year swings and the uneven results across grade levels. For families seeking a PK-8 option with strong acceleration opportunities, Horizon Montessori III offers a unique choice in the Harlingen area.

291

Students ?

15.0

Student/teacher ratio ?

$9,065

Per pupil spending ?

70.8%

Free/discounted lunch ?

2802 S 77 Sunshine Strip
Harlingen, TX 78550

(956) 423-8200

District: Horizon Montessori Public Schools

Racial breakdown:

Hispanic:

93.8%

White:

4.1%

Asian:

2.1%

See top rated Texas elementary schools

Compare Horizon Montessori III - Stem Academy to nearby elementary schools!

At a glance

▼ Ranking trend: Declining — 51st percentile in 2016 → 42nd in 2026

Worth a look

!Ranking has slipped — down 9 percentile points since 2016

!Near the bottom of Horizon Montessori Public Schools's ranking

Students meeting standards (2025-2026) ?

This school46%

District avg46%

Texas avg48%

Elementary school

2,700^th of 4,627

Texas public elementary schools ?

Bottom 42%▼ down 9 pts since 2016

From top 49% (2016) to bottom 42% (2026)

See the entire ranking list of Texas Elementary Schools →

★★★★★

SchoolDigger rating ?

Middle school

1,022^nd of 2,335

Texas public middle schools ?

Top 44%▼ down 12 pts since 2016

From top 32% (2016) to top 44% (2026)

See the entire ranking list of Texas Middle Schools →

★★★★★

SchoolDigger rating ?

4^th of 4Elementary Schools in the Horizon Montessori Public Schools

344^th of 951Horizon Montessori Public Schools among Texas districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Elementary school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	40.6	2700 of 4627	41.6%	★★☆☆☆
2025	44.6	2466 of 4651	47.0%	★★☆☆☆
2024	39.1	2893 of 4710	38.6%	★★☆☆☆
2023	48.4	2271 of 4647	51.1%	★★★☆☆
2022	44.7	2462 of 4581	46.3%	★★☆☆☆
2021	35.2	2829 of 4578	38.2%	★★☆☆☆
2019	30.5	3302 of 4479	26.3%	★☆☆☆☆
2018	37.8	2698 of 4359	38.1%	★★☆☆☆
2017	46.4	2159 of 4329	50.1%	★★★☆☆
2016	54.2	2104 of 4286	50.9%	★★★☆☆
2015	45.7	2563 of 4320	40.7%	★★☆☆☆
2014	19.3	3839 of 4260	9.9%	☆☆☆☆☆
2013	10.2	4080 of 4221	3.3%	☆☆☆☆☆
2012	10.4	4089 of 4206	2.8%	☆☆☆☆☆
2011	24.7	3599 of 4095	12.1%	★☆☆☆☆

At Risk

Year	Avg score	Statewide rank	Texas percentile	Rating
2022	45.7	2402 of 4461	46.2%	★★☆☆☆
2021	35.4	2940 of 4331	32.1%	★★☆☆☆
2019	26.4	3625 of 4295	15.6%	★☆☆☆☆
2018	23.1	3776 of 4240	10.9%	★☆☆☆☆

English Language Learner

Year	Avg score	Statewide rank	Texas percentile	Rating
2025	38.3	1846 of 2918	36.7%	★★☆☆☆
2024	48.5	1743 of 3668	52.5%	★★★☆☆
2023	60.7	1124 of 3556	68.4%	★★★☆☆
2022	46.2	1869 of 3487	46.4%	★★☆☆☆
2021	31.5	2574 of 3446	25.3%	★☆☆☆☆
2019	20.7	3060 of 3333	8.2%	☆☆☆☆☆
2018	13.7	3127 of 3226	3.1%	☆☆☆☆☆

Female

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	43.6	2514 of 4575	45.0%	★★☆☆☆
2025	45.6	1985 of 3744	47.0%	★★☆☆☆
2024	45.6	2462 of 4658	47.1%	★★☆☆☆
2023	47.8	2300 of 4588	49.9%	★★☆☆☆
2022	35.7	3058 of 4561	33.0%	★★☆☆☆
2021	28.5	3296 of 4499	26.7%	★☆☆☆☆
2019	33.5	3092 of 4348	28.9%	★☆☆☆☆
2018	43.7	2375 of 4306	44.8%	★★☆☆☆

Gifted and Talented

Year	Avg score	Statewide rank	Texas percentile	Rating
2023	71.1	717 of 2980	75.9%	★★★★☆
2022	55.8	1609 of 2958	45.6%	★★☆☆☆
2019	54.6	1810 of 3184	43.2%	★★☆☆☆
2018	45.1	2136 of 3106	31.2%	★★☆☆☆

Hispanic

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	44.9	2423 of 4413	45.1%	★★☆☆☆
2025	47.2	1905 of 3644	47.7%	★★☆☆☆
2024	37.2	2972 of 4465	33.4%	★★☆☆☆
2023	59.1	1531 of 4401	65.2%	★★★☆☆
2022	47.3	2269 of 4376	48.1%	★★☆☆☆
2021	39.1	2636 of 4329	39.1%	★★☆☆☆
2019	30.2	3278 of 4188	21.7%	★☆☆☆☆
2018	35.9	2858 of 4168	31.4%	★★☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	53.6	1870 of 4520	58.6%	★★★☆☆
2025	45.6	2041 of 3705	44.9%	★★☆☆☆
2024	39.6	2933 of 4594	36.2%	★★☆☆☆
2023	59.0	1594 of 4521	64.7%	★★★☆☆
2022	45.2	2476 of 4477	44.7%	★★☆☆☆
2021	30.5	3349 of 4451	24.8%	★☆☆☆☆
2019	35.3	3109 of 4309	27.8%	★☆☆☆☆
2018	33.0	3176 of 4264	25.5%	★☆☆☆☆

Male

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	38.3	2873 of 4582	37.3%	★★☆☆☆
2025	47.3	1856 of 3739	50.4%	★★★☆☆
2024	26.8	3676 of 4647	20.9%	★☆☆☆☆
2023	49.9	2159 of 4585	52.9%	★★★☆☆
2022	55.8	1832 of 4563	59.9%	★★★☆☆
2021	43.9	2333 of 4498	48.1%	★★☆☆☆
2019	29.8	3319 of 4357	23.8%	★☆☆☆☆
2018	34.9	2910 of 4319	32.6%	★★☆☆☆

Special Education

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	42.4	2298 of 4301	46.6%	★★☆☆☆
2025	63.3	934 of 3549	73.7%	★★★★☆
2024	32.0	3139 of 4292	26.9%	★☆☆☆☆

White

Year	Avg score	Statewide rank	Texas percentile	Rating
2019	75.8	554 of 3142	82.4%	★★★★☆
2018	90.2	128 of 3127	95.9%	★★★★★

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	50.9	1022 of 2335	56.2%	★★★☆☆
2025	30.8	1703 of 2344	27.3%	★☆☆☆☆
2024	46.8	1175 of 2372	50.5%	★★★☆☆
2023	45.0	1226 of 2330	47.4%	★★☆☆☆
2022	50.4	1005 of 2254	55.4%	★★★☆☆
2021	47.2	1096 of 2252	51.3%	★★★☆☆
2019	60.2	705 of 2193	67.9%	★★★☆☆
2018	39.9	1246 of 2080	40.1%	★★☆☆☆
2017	49.4	899 of 2027	55.6%	★★★☆☆
2016	67.0	632 of 1987	68.2%	★★★☆☆
2015	52.7	1007 of 2043	50.7%	★★★☆☆
2014	32.3	1464 of 1987	26.3%	★☆☆☆☆

At Risk

Year	Avg score	Statewide rank	Texas percentile	Rating
2022	70.5	359 of 2182	83.5%	★★★★☆
2021	52.9	779 of 2118	63.2%	★★★☆☆
2019	55.3	672 of 2058	67.3%	★★★☆☆
2018	25.3	1750 of 2008	12.8%	★☆☆☆☆

English Language Learner

Year	Avg score	Statewide rank	Texas percentile	Rating
2025	33.0	998 of 1428	30.1%	★★☆☆☆
2024	50.3	739 of 1770	58.2%	★★★☆☆

Female

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	65.9	574 of 2240	74.4%	★★★★☆
2025	25.1	1485 of 1825	18.6%	★☆☆☆☆
2024	40.7	1310 of 2242	41.6%	★★☆☆☆
2023	33.8	1569 of 2241	30.0%	★★☆☆☆
2022	42.7	1228 of 2221	44.7%	★★☆☆☆
2021	32.3	1500 of 2151	30.3%	★★☆☆☆
2019	61.4	654 of 2047	68.1%	★★★☆☆
2018	37.4	1299 of 2008	35.3%	★★☆☆☆

Hispanic

Year	Avg score	Statewide rank	Texas percentile	Rating
2026	59.4	674 of 2141	68.5%	★★★☆☆
2025	31.1	1279 of 1731	26.1%	★☆☆☆☆
2024	48.1	983 of 2119	53.6%	★★★☆☆
2023	53.6	848 of 2116	59.9%	★★★☆☆
2022	50.9	889 of 2077	57.2%	★★★☆☆
2021	50.9	864 of 2043	57.7%	★★★☆☆
2019	68.3	412 of 1935	78.7%	★★★★☆
2018	47.3	899 of 1895	52.6%	★★★☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Texas percentile	Rating
2025	22.9	1584 of 1820	13.0%	★☆☆☆☆
2024	47.8	1045 of 2235	53.2%	★★★☆☆
2022	54.0	869 of 2220	60.9%	★★★☆☆
2021	53.2	858 of 2172	60.5%	★★★☆☆
2019	64.6	517 of 2073	75.1%	★★★★☆
2018	42.1	1171 of 2039	42.6%	★★☆☆☆

Male

Year	Avg score	Statewide rank	Texas percentile	Rating
2025	23.6	1509 of 1818	17.0%	★☆☆☆☆
2024	45.7	1112 of 2246	50.5%	★★★☆☆
2023	53.3	949 of 2245	57.7%	★★★☆☆
2022	55.7	842 of 2228	62.2%	★★★☆☆
2021	36.3	1350 of 2168	37.7%	★★☆☆☆
2019	56.0	761 of 2069	63.2%	★★★☆☆
2018	46.4	1001 of 2030	50.7%	★★★☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Elementary school

White (2019)82nd percentile+56 vs school

Gifted and Talented (2023)76th percentile+25 vs school

Low Socio Economic Status (2026)59th percentile+17 vs school

Special Education (2026)47th percentile+5 vs school

At Risk (2022)46th percentile~ school

Hispanic (2026)45th percentile+3 vs school

Female (2026)45th percentile+3 vs school

Male (2026)37th percentile-4 vs school

English Language Learner (2025)37th percentile-10 vs school

Middle school

At Risk (2022)84th percentile+28 vs school

Female (2026)74th percentile+18 vs school

Hispanic (2026)69th percentile+12 vs school

English Language Learner (2025)30th percentile+3 vs school

Male (2025)17th percentile-10 vs school

Low Socio Economic Status (2025)13th percentile-14 vs school

By subject vs Texas (2025-2026) ?

English I Reading88%+32 vs state

Algebra I62%+8 vs state

Reading46%-8 vs state

Mathematics40%~ state avg

Social Studies38%+6 vs state

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Schools Near Horizon Montessori III - Stem Academy

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				STAAR EOC Algebra I (2026)	STAAR EOC English I Reading (2026)	STAAR Reading (2026)					STAAR Mathematics (2026)					STAAR Social Studies (2026)	Per Pupil Expenditures (2024)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	STAAR EOC Algebra I End of Course	STAAR EOC English I Reading End of Course	STAAR Reading 3rd Grade	STAAR Reading 4th Grade	STAAR Reading 5th Grade	STAAR Reading 6th Grade	STAAR Reading 7th Grade	STAAR Mathematics 3rd Grade	STAAR Mathematics 4th Grade	STAAR Mathematics 5th Grade	STAAR Mathematics 6th Grade	STAAR Mathematics 7th Grade	STAAR Social Studies 8th Grade	Total
Horizon Montessori III - Stem Academy	Public, Charter	PK, KG-8	2802 S 77 Sunshine Strip	Harlingen	78550	Cameron County	Horizon Montessori Public Schools	Yes	No	(n/a)	Yes	(956) 423-8200	291	19	15.0	70.8%	12 (4.1%)	0 (0.0%)	273 (93.8%)	6 (2.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	40.6	2700^th of 4627 public elementary schools	41.6%		44.6	2466^th of 4651 public elementary schools	47.0%	234	62.5	87.5	40.9	37.9	61.1	53.3	40.0	50.0	37.9	38.9	33.3	40.0	37.5	$9,065
Treasure Hills Elementary	Public	PK, KG-5	2525 Haine Dr	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3180	758	49	15.3	69.4%	40 (5.3%)	6 (0.8%)	696 (91.8%)	11 (1.5%)	1 (0.1%)	0 (0.0%)	4 (0.5%)	50.9	2070^th of 4627 public elementary schools	55.3%		45.8	2396^th of 4651 public elementary schools	48.5%	326			46.5	56.4	64.7			34.2	50.9	42.2				$9,099
Idea Academy San Benito	Public, Charter	K-5	2151 Russell Ln	San Benito	78586	Cameron County	Idea Public Schools	Yes	No	(n/a)	Yes	(956) 399-5252	685	36	18.9	80.3%	25 (3.6%)	4 (0.6%)	648 (94.6%)	5 (0.7%)	0 (0.0%)	0 (0.0%)	3 (0.4%)	62.7	1476^th of 4627 public elementary schools	68.1%		58.4	1652^nd of 4651 public elementary schools	64.5%	176			51.4	61.7	62.5			45.1	60.9	46.1				$10,983
Houston Elementary	Public	PK, KG-5	301 E Taft Ave	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3110	420	29	14.6	90.7%	9 (2.1%)	2 (0.5%)	408 (97.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (0.2%)	60.9	1573^rd of 4627 public elementary schools	66.0%		45.3	2428^th of 4651 public elementary schools	47.8%	855			52.2	60.7	56.5			58.7	51.8	43.5				$11,825
Bonham Elementary	Public	PK, KG-5	2400 E Jefferson	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3070	504	30	16.7	90.9%	18 (3.6%)	1 (0.2%)	480 (95.2%)	0 (0.0%)	1 (0.2%)	0 (0.0%)	4 (0.8%)	56.1	1805^th of 4627 public elementary schools	61.0%		46.3	2364^th of 4651 public elementary schools	49.2%	559			52.5	51.5	59.5			52.5	35.7	56.2				$10,116
Travis Elementary	Public	PK, KG-5	600 E Polk Ave	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3170	294	17	16.9	98.0%	4 (1.4%)	1 (0.3%)	289 (98.3%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	61.2	1565^th of 4627 public elementary schools	66.2%		35.8	3068^th of 4651 public elementary schools	34.0%	1503			53.9	51.2	71.4			51.3	46.5	50.0				$10,834
Bowie Elementary	Public	PK, KG-5	309 W Lincoln Ave	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3080	335	21	16.2	93.4%	5 (1.5%)	2 (0.6%)	322 (96.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	6 (1.8%)	72.9	1020^th of 4627 public elementary schools	78.0%		71.1	1087^th of 4651 public elementary schools	76.6%	67			38.5	65.1	77.1			46.2	71.4	77.1				$10,598
Ben Milam Elementary	Public	PK, KG-5	1215 Rangerville Rd	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3150	389	23	17.0	97.2%	16 (4.1%)	0 (0.0%)	372 (95.6%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (0.3%)	62.1	1511^th of 4627 public elementary schools	67.3%		52.6	1986^th of 4651 public elementary schools	57.3%	475			53.5	45.0	66.7			55.8	43.9	60.4				$10,675
Fred Booth Global Leadership Academy	Public	PK, KG-5	705 Zaragoza St	San Benito	78586	Cameron County	San Benito Consolidated Independent School District	No	No	(n/a)	Yes	(956) 361-6860	441	28	15.9	93.2%	16 (3.6%)	0 (0.0%)	423 (95.9%)	0 (0.0%)	2 (0.5%)	0 (0.0%)	0 (0.0%)	18.6	4123^rd of 4627 public elementary schools	10.9%		26.1	3662^nd of 4651 public elementary schools	21.3%	461			27.1	35.2	50.9			6.1	37.0	25.4				$9,600
Austin Elementary	Public	PK, KG-5	700 E Austin Ave	Harlingen	78550	Cameron County	Harlingen Consolidated Independent School District	No	No	(n/a)	Yes	(956) 427-3060	295	21	14.0	87.1%	16 (5.4%)	1 (0.3%)	278 (94.2%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	57	1758^th of 4627 public elementary schools	62.0%		41.7	2661^st of 4651 public elementary schools	42.8%	903			61.5	58.7	48.8			61.5	51.1	20.0				$12,857

Frequently Asked Questions about Horizon Montessori III - Stem Academy

How many students attend Horizon Montessori III - Stem Academy?

In the 2024-25 school year, 291 students attended Horizon Montessori III - Stem Academy.

What district is Horizon Montessori III - Stem Academy in?

Horizon Montessori Public Schools

What is the racial makeup of Horizon Montessori III - Stem Academy?

Students at Horizon Montessori III - Stem Academy are 94% Hispanic, 4% White, 2% Asian.

Is Horizon Montessori III - Stem Academy a good school?

Horizon Montessori III - Stem Academy ranks 2700^th of 4627 Texas elementary schools. SchoolDigger rates this school 2 stars out of 5.

Rate Horizon Montessori III - Stem Academy!

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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Texas Education Agency.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.