Serving 184 students in grades 9-12, Lester R Arnold High School ranks in the bottom 50% of all schools in Colorado for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is ≤10% (which is lower than the Colorado state average of 33%). The percentage of students achieving proficiency in reading/language arts is ≤10% (which is lower than the Colorado state average of 45%).
The student-teacher ratio of 20:1 is higher than the Colorado state level of 15:1.
Minority enrollment is 89% of the student body (majority Hispanic), which is higher than the Colorado state average of 51% (majority Hispanic).
Quick Facts (26-27)
- School Type: Alternative school
- Grades: 9-12
- Enrollment: 184 students
- Student-Teacher Ratio: 20:1
- Minority Enrollment: 89%
- Graduation Rate: 25-29% (Btm 50% in CO)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: ≤10% (Btm 50%)
- Reading Proficiency: ≤10% (Btm 50%)
- Science Proficiency: ≤10% (Btm 50%)
- Source: National Center for Education Statistics (NCES), CO Dept. of Education
School Overview
Lester R Arnold High School's student population of 184 students has stayed relatively flat over five school years.
The teacher population of 9 teachers has declined by 25% over five school years.
School Type
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
184 students
Showing 2015–2025. View full 39-year historical data
Total Classroom Teachers
9 teachers
Showing 2015–2025. View full 39-year historical data
School Calendar
School Rankings
Lester R Arnold High School ranks within the bottom 50% of all 1,748 schools in Colorado (based off of combined math and reading proficiency testing data).
The diversity score of Lester R Arnold High School is 0.25, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#1673 out of 1748 schools
(Bottom 50%)
(Bottom 50%)
Showing 2012–2023. View full 14-year historical data
Math Test Scores (% Proficient)
≤10%
33%
Showing 2012–2023. View full 14-year historical data
Reading/Language Arts Test Scores (% Proficient)
≤10%
45%
Showing 2011–2022. View full 13-year historical data
Science Test Scores (% Proficient)
(20-21)≤10%
29%
Student-Teacher Ratio
20:1
15:1
Showing 2015–2025. View full 39-year historical data
American Indian
2%
1%
Showing 2013–2025. View full 38-year historical data
Hispanic
86%
37%
Showing 2015–2025. View full 38-year historical data
Black
1%
5%
Showing 2015–2025. View full 38-year historical data
White
11%
49%
Showing 2015–2025. View full 38-year historical data
All Ethnic Groups
Showing 2015–2025. View full 38-year historical data
Graduation Rate
25-29%
82.7%
Showing 2014–2023. View full 13-year historical data
Chronically Absent Students
(22-23)100%
33.6%
Eligible for Free Lunch
76%
39%
Showing 2015–2025. View full 37-year historical data
Eligible for Reduced Lunch
13%
5%
Showing 2015–2025. View full 26-year historical data
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CO Dept. of Education
Frequently Asked Questions
What is Lester R Arnold High School's ranking?
Lester R Arnold High School is ranked #1673 out of 1,748 schools, which ranks it among the bottom 50% of public schools in Colorado.
What schools are Lester R Arnold High School often compared to?
Lester R Arnold High Schoolis often viewed alongside schools like Adams City High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
≤10% of students have achieved math proficiency (compared to the 33% CO state average), while ≤10% of students have achieved reading proficiency (compared to the 45% CO state average).
What is the graduation rate of Lester R Arnold High School?
The graduation rate of Lester R Arnold High School is 25-29%, which is lower than the Colorado state average of 82.7%.
How many students attend Lester R Arnold High School?
184 students attend Lester R Arnold High School.
What is the racial composition of the student body?
86% of Lester R Arnold High School students are Hispanic, 11% of students are White, 2% of students are American Indian, and 1% of students are Black.
What is the student-teacher ratio of Lester R Arnold High School?
Lester R Arnold High School has a student ration of 20:1, which is higher than the Colorado state average of 15:1.
What grades does Lester R Arnold High School offer ?
Lester R Arnold High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Lester R Arnold High School part of?
Lester R Arnold High School is part of School District N. 14 In The County Of Adams & State Of Colo.
School Reviews
5 10/10/2025
The best school i have ever went to!!!
5 10/10/2025
I love the whole concept of this school.
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