Serving 760 students in grades Prekindergarten-8, Addenbrooke Classical Grammar School ranks in the top 50% of all schools in Colorado for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 38% (which is higher than the Colorado state average of 33%). The percentage of students achieving proficiency in reading/language arts is 43% (which is lower than the Colorado state average of 45%).
The student-teacher ratio of 18:1 is higher than the Colorado state level of 15:1.
Minority enrollment is 36% of the student body (majority Hispanic), which is lower than the Colorado state average of 50% (majority Hispanic).
Quick Facts (2026)
- School Type: Charter School
- Grades: Prekindergarten-8
- Enrollment: 760 students
- Student-Teacher Ratio: 18:1
- Minority Enrollment: 36%
- Overall Testing Rank: Top 50% in CO
- Math Proficiency: 38% (Top 50%)
- Reading Proficiency: 43% (Top 50%)
- Source: National Center for Education Statistics (NCES), CO Dept. of Education
School Overview
Addenbrooke Classical Grammar School's student population of 760 students has grown by 73% over five school years.
The teacher population of 43 teachers has grown by 72% over five school years.
School Type
Grades Offered
Grades Prekindergarten-8
(No virtual instruction)
(No virtual instruction)
Total Students
760 students
Gender %
Total Classroom Teachers
43 teachers
Year Founded
2015
Last Day of School
Mon. May 25, 2026
Average Class Size
15 students
School Rankings
Addenbrooke Classical Grammar School ranks within the top 50% of all 1,748 schools in Colorado (based off of combined math and reading proficiency testing data).
The diversity score of Addenbrooke Classical Grammar School is 0.51, which is less than the diversity score at state average of 0.62. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#735 out of 1748 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
38%
33%
Reading/Language Arts Test Scores (% Proficient)
43%
45%
Student-Teacher Ratio
18:1
15:1
American Indian
n/a
1%
Asian
2%
3%
Hispanic
29%
36%
Black
1%
5%
White
64%
50%
Hawaiian
n/a
n/a
Two or more races
4%
5%
All Ethnic Groups
Eligible for Free Lunch
8%
39%
Eligible for Reduced Lunch
2%
6%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CO Dept. of Education
Frequently Asked Questions
What is Addenbrooke Classical Grammar School's ranking?
Addenbrooke Classical Grammar School is ranked #735 out of 1,748 schools, which ranks it among the top 50% of public schools in Colorado.
What percent of students have achieved state testing proficiency in math and reading?
38% of students have achieved math proficiency (compared to the 33% CO state average), while 43% of students have achieved reading proficiency (compared to the 45% CO state average).
How many students attend Addenbrooke Classical Grammar School?
760 students attend Addenbrooke Classical Grammar School.
What is the racial composition of the student body?
64% of Addenbrooke Classical Grammar School students are White, 29% of students are Hispanic, 4% of students are Two or more races, 2% of students are Asian, and 1% of students are Black.
What is the student-teacher ratio of Addenbrooke Classical Grammar School?
Addenbrooke Classical Grammar School has a student ration of 18:1, which is higher than the Colorado state average of 15:1.
What grades does Addenbrooke Classical Grammar School offer ?
Addenbrooke Classical Grammar School offers enrollment in grades Prekindergarten-8 (No virtual instruction).
What school district is Addenbrooke Classical Grammar School part of?
Addenbrooke Classical Grammar School is part of Jefferson County School District No. R-1.
In what neighborhood is Addenbrooke Classical Grammar School located?
Addenbrooke Classical Grammar School is located in the Academy Park neighborhood of Denver, CO. There are 1 other public schools located in Academy Park.
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