Horizon Montessori - Stem Academy (Ranked Top 20% for 2025-26)

320 N Main St
Mcallen, TX 78501

Top 20%

Serving 342 students in grades Prekindergarten-8, Horizon Montessori - Stem Academy ranks in the top 20% of all schools in Texas for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).

The percentage of students achieving is 50-54% (which is higher than the Texas state average of 44%). The percentage of students achieving is 65-69% (which is higher than the Texas state average of 51%).

The student-teacher ratio of 13:1 is lower than the Texas state level of 14:1.

Minority enrollment is 98% of the student body (majority Hispanic), which is higher than the Texas state average of 75% (majority Hispanic).

Quick Facts (2025-26)

School Type: Charter School
Grades: Prekindergarten-8
Enrollment: 342 students
Student-Teacher Ratio: 13:1
Minority Enrollment: 98%
: Top 20% in TX
: 50-54% (Top 30%)
: 65-69% (Top 20%)
: 21-39% (Btm 50%)
Source: National Center for Education Statistics (NCES), TX Dept. of Education

Top Rankings

Horizon Montessori - Stem Academy ranks among the top 20% of public schools in Texas for:

School Overview

Horizon Montessori - Stem Academy's student population of 342 students has declined by 42% over five school years.

The teacher population of 26 teachers has declined by 31% over five school years.

School Type

Charter School

Grades Offered

Grades Prekindergarten-8

View Data

Distribution of Students By Grade Trends
Grade	Horizon Montessori - Stem Academy
Pre-K	60
Kind	39
1	42
2	39
3	40
4	32
5	35
6	28
7	14
8	13

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Total Students

342 students

View Data

Total Students Trends Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy
2023	381
2022	391
2021	404
2020	598
2019	598
2018	714
2017	714
2016	681
2015	609
2014	618
2013	521
2012	435
2011	401
2010	384
2009	381
2008	357
2007	322
2006	229
2005	167

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Gender %

Total Classroom Teachers

26 teachers

View Data

Total Classroom Teachers Trends Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy
2023	28
2022	24
2021	27
2020	38
2019	38
2018	39
2017	39
2016	38
2015	35
2014	33
2013	32
2012	24
2011	23
2010	23
2009	19
2008	22
2007	20
2006	15
2005	12

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Year Founded

1998

Last Day of School

Fri. May 1, 2026

School Rankings

Horizon Montessori - Stem Academy ranks within the top 20% of all 8,096 schools in Texas (based off of combined math and reading proficiency testing data).

The of Horizon Montessori - Stem Academy is 0.08, which is less than the diversity score at state average of 0.64. The school's diversity has stayed relatively flat over five school years.

This School

State Level (TX)

#1616 out of 8096 schools
(Top 20%)

View Data

Overall School Rank Trends Over Years (2012-2023)
Year	Horizon Montessori - Stem Academy
2023	#1616
2022	#2672
2021	#3662
2019	#3565
2018	#3103
2017	#2519
2016	#3628
2015	#3230
2014	#2801
2013	#4375
2012	#1610

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50-54%

44%

View Data

Math Proficiency Comparison Over Years (2012-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	52%	44%	37%
2022	37%	41%	30%
2021	27%	37%	22%
2019	48%	51%	43%
2018	58%	49%	46%
2017	86%	78%	83%
2016	80%	75%	80%
2015	80%	73%	71%
2014	79%	76%	72%
2013	70%	78%	70%
2012	92%	83%	88%

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65-69%

51%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2011-2022)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2022	67%	51%	48%
2021	47%	42%	39%
2019	47%	47%	46%
2018	41%	45%	46%
2017	76%	72%	74%
2016	71%	71%	72%
2015	74%	73%	71%
2014	82%	75%	77%
2013	80%	78%	78%
2012	92%	88%	88%
2011	92%	88%	88%

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21-39%

46%

View Data

Science Proficiency Comparison Over Years (2021-2022)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2022	30%	46%	27%
2021	34%	43%	32%

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Student-Teacher Ratio

13:1

14:1

View Data

Student-Teacher Ratio Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	14:1	14:1	15:1
2022	16:1	14:1	17:1
2021	15:1	14:1	15:1
2020	16:1	15:1	17:1
2019	16:1	15:1	17:1
2018	18:1	15:1	19:1
2017	18:1	15:1	19:1
2016	18:1	15:1	18:1
2015	17:1	15:1	17:1
2014	19:1	15:1	18:1
2013	16:1	15:1	15:1
2012	18:1	15:1	16:1
2011	18:1	15:1	18:1
2010	17:1	15:1	16:1
2009	20:1	14:1	18:1
2008	16:1	14:1	17:1
2007	16:1	15:1	15:1
2006	15:1	15:1	13:1
2005	14:1	15:1	15:1

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American Indian

n/a

Asian

View Data

Asian Student Percentage Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	1%	5%	3%
2022	1%	5%	3%
2021	1%	5%	3%
2020	1%	5%	2%
2019	1%	5%	2%
2018	1%	5%
2017	1%	5%
2016	2%	4%	2%
2015	3%	4%	2%
2014	3%	4%	2%
2013	4%	4%	2%
2012	7%	4%	4%
2011	5%	4%	3%
2010	4%	4%	3%
2009	5%	4%	4%
2008	4%	4%	3%
2007	5%	4%	4%
2006	5%	3%	4%
2005	5%	3%	3%

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Hispanic

96%

53%

View Data

Hispanic Student Percentage Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	94%	53%	82%
2022	96%	53%	85%
2021	95%	53%	87%
2020	97%	53%	96%
2019	97%	53%	96%
2018	94%	52%	96%
2017	94%	52%	96%
2016	93%	52%	94%
2015	91%	52%	93%
2014	92%	52%	92%
2013	90%	51%	91%
2012	87%	51%	89%
2011	85%	50%	88%
2010	82%	49%	85%
2009	79%	48%	82%
2008	79%	47%	84%
2007	72%	46%	79%
2006	72%	46%	80%
2005	74%	45%	81%

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Black

n/a

13%

View Data

Black Student Percentage Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	1%	13%	5%
2010	1%	14%	1%
2009	1%	14%	1%
2008	2%	14%	1%
2007	2%	14%	1%
2006	1%	15%	1%
2005	1%	14%	1%

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White

25%

View Data

White Student Percentage Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	3%	26%	7%
2022	2%	26%	7%
2021	3%	26%	6%
2020	1%	27%	2%
2019	1%	27%	2%
2018	4%	28%	4%
2017	4%	28%	4%
2016	4%	29%	4%
2015	5%	29%	5%
2014	5%	29%	6%
2013	5%	30%	6%
2012	6%	31%	7%
2011	10%	31%	9%
2010	12%	33%	10%
2009	14%	34%	12%
2008	14%	35%	11%
2007	21%	36%	16%
2006	22%	36%	15%
2005	20%	38%	15%

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Hawaiian

n/a

Two or more races

All Ethnic Groups

0.08

0.64

View Data

Diversity Score Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	0.12	0.64	0.31
2022	0.08	0.64	0.28
2021	0.10	0.64	0.24
2020	0.06	0.63	0.08
2019	0.06	0.63	0.08
2018	0.12	0.64	0.09
2017	0.12	0.64	0.09
2016	0.13	0.63	0.11
2015	0.17	0.63	0.13
2014	0.15	0.63	0.15
2013	0.19	0.64	0.17
2012	0.24	0.64	0.21
2011	0.27	0.64	0.22
2010	0.31	0.64	0.27
2009	0.36	0.64	0.31
2008	0.36	0.64	0.29
2007	0.44	0.64	0.36
2006	0.44	0.64	0.34
2005	0.41	0.64	0.32

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Participates in the

Yes

Eligible for

76%

57%

View Data

Free Lunch Eligibility Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	78%	57%	69%
2022	72%	57%	68%
2021	67%	56%	63%
2020	59%	56%	66%
2019	59%	56%	66%
2018	27%	53%	49%
2017	27%	53%	49%
2016	27%	53%	54%
2015	59%	52%	63%
2014	64%	53%	68%
2013	63%	53%	67%
2012	52%	44%	61%
2011	52%	44%	59%
2010	49%	43%	55%
2009	46%	40%	49%
2008	38%	39%	47%
2007	40%	39%	48%
2006	38%	40%	48%
2005	34%	39%	49%

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Eligible for

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2005-2023)
Year	Horizon Montessori - Stem Academy	Texas	Horizon Montessori 51��s
2023	3%	5%	4%
2022	2%	4%	3%
2021	8%	4%	6%
2018	33%	6%	17%
2017	33%	6%	17%
2016	38%	6%	19%
2015	10%	6%	6%
2014	15%	7%	13%
2013	11%	7%	12%
2012	11%	7%	13%
2011	11%	7%	13%
2010	15%	8%	16%
2009	17%	8%	18%
2008	18%	8%	15%
2007	11%	8%	11%
2006	14%	8%	13%
2005	9%	8%	9%

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School Statewide Testing

School District Name

Horizon Montessori 51��s

Source: National Center for Education Statistics (NCES), TX Dept. of Education

Profile last updated: 02/09/2025

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Frequently Asked Questions

What is Horizon Montessori - Stem Academy's ranking?

Horizon Montessori - Stem Academy is ranked #1616 out of 8,096 schools, which ranks it among the top 20% of public schools in Texas.

What percent of students have achieved state testing proficiency in math and reading?

50-54% of students have achieved math proficiency (compared to the 44% TX state average), while 65-69% of students have achieved reading proficiency (compared to the 51% TX state average).

How many students attend Horizon Montessori - Stem Academy?

342 students attend Horizon Montessori - Stem Academy.

What is the racial composition of the student body?

96% of Horizon Montessori - Stem Academy students are Hispanic, 2% of students are White, 1% of students are Asian, and 1% of students are Two or more races.

What is the student-teacher ratio of Horizon Montessori - Stem Academy?

Horizon Montessori - Stem Academy has a student ration of 13:1, which is lower than the Texas state average of 14:1.

What grades does Horizon Montessori - Stem Academy offer ?

Horizon Montessori - Stem Academy offers enrollment in grades Prekindergarten-8

What school district is Horizon Montessori - Stem Academy part of?

Horizon Montessori - Stem Academy is part of Horizon Montessori 51��s.