Lowest Student–Teacher Ratio in State Charter School Institute (2025)

Schools with the fewest students per FTE teacher, among schools with at least 100 students. Ranked by the Success Index (US) from official American data; 27 schools in State Charter School Institute, Colorado. Rank positions shown on each profile are within United States and Colorado.

1
65
Animas High SchoolDurango · Charter HighStudents per teacher: 11.3
2
40
Colorado International Language AcademyColorado Springs · Charter ElementaryStudents per teacher: 12.3
3
51
Stone Creek SchoolEdwards · Charter ElementaryStudents per teacher: 12.9
4
38
Mountain Song Community SchoolColorado Springs · Charter ElementaryStudents per teacher: 13.5
5
74
Colorado Early Colleges WindsorWindsor · Charter HighStudents per teacher: 14.0
6
63
Steamboat MontessoriSteamboat Springs · Charter ElementaryStudents per teacher: 14.0
7
21
Montessori del Mundo Charter SchoolAurora · Charter ElementaryStudents per teacher: 14.0
8
70
Colorado Early Colleges Colorado SpringsColorado Springs · Charter HighStudents per teacher: 14.1
9
46
Academy of Arts and Knowledge ElementaryFT Collins · Charter ElementaryStudents per teacher: 14.1
10
41
Salida Montessori Charter SchoolSalida · Charter ElementaryStudents per teacher: 14.3
11
54
Victory Preparatory Academy High State Charter SchoolCommerce City · Charter HighStudents per teacher: 14.8
12
46
Global Village Academy - NorthNorthglenn · Charter ElementaryStudents per teacher: 15.2
13
63
Axis International AcademyFort Collins · Charter ElementaryStudents per teacher: 16.0
14
38
Coperni 3Colorado Springs · Charter ElementaryStudents per teacher: 16.0
15
40
Colorado Springs Charter AcademyColorado Springs · Charter ElementaryStudents per teacher: 16.4
16
12
Ricardo Flores Magon AcademyDenver · Charter ElementaryStudents per teacher: 17.2
17
39
Crown Pointe Charter AcademyWestminster · Charter ElementaryStudents per teacher: 17.7
18
62
Mountain Middle SchoolDurango · Charter MiddleStudents per teacher: 18.9
19
17
Ascent Classical Academy of Northern DenverBrighton · Charter ElementaryStudents per teacher: 19.1
20
22
High Point AcademyAurora · Charter ElementaryStudents per teacher: 19.4
21
37
Ross Montessori SchoolCarbondale · Charter ElementaryStudents per teacher: 20.3
22
44
Academy of Advanced LearningAurora · Charter ElementaryStudents per teacher: 22.3
23
76
Colorado Early Colleges Douglas CountyEnglewood · Charter HighStudents per teacher: 23.0
24
22
Colorado Early Colleges AuroraAurora · Charter HighStudents per teacher: 24.7
25
60
Colorado Early Colleges Fort CollinsFort Collins · Charter HighStudents per teacher: 24.9
26
37
Community Leadership AcademyCommerce City · Charter ElementaryStudents per teacher: 26.3
27
39
Victory Preparatory Academy Middle State Charter SchoolCommerce City · Charter MiddleStudents per teacher: 33.2

#	School	Sector	Students per teacher	Success Index (US)	Key result	Students
1	Animas High School Durango · High · Grades 9–12	Charter	11.3	64.7 Top 50%	32% Math proficiency	249
2	Colorado International Language Academy Colorado Springs · Elementary · Grades K–5	Charter	12.3	39.9 Lower 50%	22% Math proficiency	321
3	Stone Creek School Edwards · Elementary · Grades K–8	Charter	12.9	50.9 Top 50%	31% Math proficiency	297
4	Mountain Song Community School Colorado Springs · Elementary · Grades K–8	Charter	13.5	38.1 Lower 50%	12% Math proficiency	324
5	Colorado Early Colleges Windsor Windsor · High · Grades 6–12	Charter	14.0	74.1 Top 25%	26% Free/reduced-price lunch	196
6	Steamboat Montessori Steamboat Springs · Elementary · Grades PK–6	Charter	14.0	63.4 Top 50%	34.5% Math proficiency	140
7	Montessori del Mundo Charter School Aurora · Elementary · Grades PK–6	Charter	14.0	21.0 Lower 50%	7.5% Math proficiency	365
8	Colorado Early Colleges Colorado Springs Colorado Springs · High · Grades 6–12	Charter	14.1	70.4 Top 25%	57% Math proficiency	677
9	Academy of Arts and Knowledge Elementary FT Collins · Elementary · Grades PK–5	Charter	14.1	45.8 Lower 50%	32% Math proficiency	240
10	Salida Montessori Charter School Salida · Elementary · Grades PK–8	Charter	14.3	40.5 Lower 50%	24.5% Math proficiency	186
11	Victory Preparatory Academy High State Charter School Commerce City · High · Grades 9–12	Charter	14.8	53.5 Top 50%	49.5% Math proficiency	118
12	Global Village Academy - North Northglenn · Elementary · Grades K–8	Charter	15.2	46.2 Lower 50%	34% Math proficiency	838
13	Axis International Academy Fort Collins · Elementary · Grades PK–6	Charter	16.0	63.0 Top 50%	33.3% Free/reduced-price lunch	288
14	Coperni 3 Colorado Springs · Elementary · Grades K–8	Charter	16.0	37.9 Lower 50%	70% Free/reduced-price lunch	367
15	Colorado Springs Charter Academy Colorado Springs · Elementary · Grades K–8	Charter	16.4	39.5 Lower 50%	29% Math proficiency	295
16	Ricardo Flores Magon Academy Denver · Elementary · Grades K–8	Charter	17.2	11.9 Lower 50%	7.5% Math proficiency	292
17	Crown Pointe Charter Academy Westminster · Elementary · Grades K–8	Charter	17.7	39.0 Lower 50%	35% Math proficiency	461
18	Mountain Middle School Durango · Middle · Grades 4–8	Charter	18.9	61.7 Top 50%	46% Math proficiency	302
19	Ascent Classical Academy of Northern Denver Brighton · Elementary · Grades K–8	Charter	19.1	16.9 Lower 50%	–	305
20	High Point Academy Aurora · Elementary · Grades PK–8	Charter	19.4	22.4 Lower 50%	16% Math proficiency	680
21	Ross Montessori School Carbondale · Elementary · Grades PK–8	Charter	20.3	37.1 Lower 50%	22% Math proficiency	183
22	Academy of Advanced Learning Aurora · Elementary · Grades K–8	Charter	22.3	44.0 Lower 50%	46.3% Free/reduced-price lunch	847
23	Colorado Early Colleges Douglas County Englewood · High · Grades 9–12	Charter	23.0	76.4 Top 25%	67% Math proficiency	1,035
24	Colorado Early Colleges Aurora Aurora · High · Grades 9–12	Charter	24.7	21.8 Lower 50%	22% Math proficiency	567
25	Colorado Early Colleges Fort Collins Fort Collins · High · Grades 6–12	Charter	24.9	60.0 Top 50%	48% Math proficiency	971
26	Community Leadership Academy Commerce City · Elementary · Grades PK–5	Charter	26.3	36.7 Lower 50%	36% Math proficiency	316
27	Victory Preparatory Academy Middle State Charter School Commerce City · Middle · Grades 6–8	Charter	33.2	38.7 Lower 50%	29% Math proficiency	166

Animas High School in Durango leads the 2025 list of lowest student–teacher ratio in State Charter School Institute with Students per teacher 11.3. Of the 27 schools shown, 27 are charter.

For the full picture see the wider Colorado lowest student–teacher ratio rankings, every school on the State Charter School Institute page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best ratio school in State Charter School Institute?

Animas High School in Durango, Colorado ranks first among lowest student–teacher ratio in State Charter School Institute with Students per teacher 11.3 (Enrollment: 249).

How are lowest student–teacher ratio in State Charter School Institute ranked?

Schools with the fewest students per FTE teacher, among schools with at least 100 students. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.