Common Ground High School is a charter school in New Haven, Connecticut, United States. It was founded in 1997 in the first round of charter schools created in Connecticut and is the oldest environmental charter school in the United States. The school subsequently expanded to reach approximately 180 students.
Serving 221 students in grades 9-12, Common Ground High School ranks in the bottom 50% of all schools in Connecticut 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 Connecticut state average of 41%). The percentage of students achieving proficiency in reading/language arts is 20-29% (which is lower than the Connecticut state average of 50%).
The student-teacher ratio of 10:1 is lower than the Connecticut state level of 12:1.
Minority enrollment is 85% of the student body (majority Hispanic), which is higher than the Connecticut state average of 54% (majority Hispanic and Black).
Quick Facts (2026)
- School Type: Charter School
- Grades: 9-12
- Enrollment: 221 students
- Student-Teacher Ratio: 10:1
- Minority Enrollment: 85%
- Graduation Rate: 70-79% (Btm 50% in CT)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: ≤10% (Btm 50%)
- Reading Proficiency: 20-29% (Btm 50%)
- Science Proficiency: 11-19% (Btm 50%)
- Source: National Center for Education Statistics (NCES), CT Dept. of Education
School Overview
Common Ground High School's student population of 221 students has declined by 5% over five school years.
The teacher population of 22 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
221 students
Total Classroom Teachers
22 teachers
Year Founded
1997
Colors
White, Green
School Calendar
School Motto
Planting Seeds. Growing Leaders. Cultivating Community.
Average Class Size
47 students
School Rankings
Common Ground High School ranks within the bottom 50% of all 939 schools in Connecticut (based off of combined math and reading proficiency testing data).
The diversity score of Common Ground High School is 0.65, which is less than the diversity score at state average of 0.68. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#852 out of 939 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
≤10%
41%
Reading/Language Arts Test Scores (% Proficient)
20-29%
50%
Science Test Scores (% Proficient)
11-19%
47%
Student-Teacher Ratio
10:1
12:1
American Indian
n/a
n/a
Asian
2%
5%
Hispanic
47%
32%
Black
33%
12%
White
15%
46%
Hawaiian
n/a
n/a
Two or more races
3%
5%
All Ethnic Groups
Graduation Rate
70-79%
89%
Chronically Absent Students
(22-23)22.6%
19.3%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
58%
38%
Eligible for Reduced Lunch
6%
6%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CT Dept. of Education
Frequently Asked Questions
What is Common Ground High School's ranking?
Common Ground High School is ranked #852 out of 939 schools, which ranks it among the bottom 50% of public schools in Connecticut.
What schools are Common Ground High School often compared to?
Common Ground High Schoolis often viewed alongside schools like Amistad Academy 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 41% CT state average), while 20-29% of students have achieved reading proficiency (compared to the 50% CT state average).
What is the graduation rate of Common Ground High School?
The graduation rate of Common Ground High School is 70-79%, which is lower than the Connecticut state average of 89%.
How many students attend Common Ground High School?
221 students attend Common Ground High School.
What is the racial composition of the student body?
47% of Common Ground High School students are Hispanic, 33% of students are Black, 15% of students are White, 3% of students are Two or more races, and 2% of students are Asian.
What is the student-teacher ratio of Common Ground High School?
Common Ground High School has a student ration of 10:1, which is lower than the Connecticut state average of 12:1.
What grades does Common Ground High School offer ?
Common Ground High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Common Ground High School part of?
Common Ground High School is part of Common Ground High School District.
In what neighborhood is Common Ground High School located?
Common Ground High School is located in the West Rock neighborhood of New Haven, CT. There are 3 other public schools located in West Rock.
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