Cinnabar Charter

286 Skillman Ln.
Petaluma, CA 94952
(School attendance zone shown in map)
5/
10
Bottom 50%
Serving 156 students in grades Kindergarten-8, Cinnabar Charter ranks in the bottom 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 25-29% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 30-34% (which is lower than the California state average of 47%).
The student-teacher ratio of 17:1 is lower than the California state level of 21:1.
Minority enrollment is 85% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).

Quick Facts (2026)

  • School Type: Charter School
  • Grades: Kindergarten-8
  • Enrollment: 156 students
  • Student-Teacher Ratio: 17:1
  • Minority Enrollment: 85%
  • : Bottom 50% in CA
  • : 25-29% (Btm 50%)
  • : 30-34% (Btm 50%)
  • : 11-19% (Btm 50%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

School Overview

Cinnabar Charter's student population of 156 students has declined by 32% over five school years.
The teacher population of 9 teachers has declined by 18% over five school years.
School Type
Grades Offered
Grades Kindergarten-8
Total Students
156 students
Total Classroom Teachers
9 teachers
School Calendar

School Rankings

Cinnabar Charter ranks within the bottom 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Cinnabar Charter is 0.34, 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.
This School
State Level (CA)
#5677 out of 9523 schools
(Bottom 50%)
25-29%
34%
30-34%
47%
11-19%
29%
Student-Teacher Ratio
17:1
21:1
American Indian
1%
1%
Asian
n/a
12%
Hispanic
80%
56%
Black
1%
5%
White
15%
20%
Hawaiian
n/a
n/a
Two or more races
3%
6%
All Ethnic Groups
0.34
(22-23)
32.1%
27.7%
Eligible for Free Lunch
64%
54%
Eligible for Reduced Lunch
19%
8%
School Statewide Testing
Source: National Center for Education Statistics (NCES), CA Dept. of Education

Frequently Asked Questions

What is Cinnabar Charter's ranking?
Cinnabar Charter is ranked #5677 out of 9,523 schools, which ranks it among the bottom 50% of public schools in California.
What schools are Cinnabar Charter often compared to?
Cinnabar Charteris often viewed alongside schools like Dunham Charter, Corona Creek Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
25-29% of students have achieved math proficiency (compared to the 34% CA state average), while 30-34% of students have achieved reading proficiency (compared to the 47% CA state average).
How many students attend Cinnabar Charter?
156 students attend Cinnabar Charter.
What is the racial composition of the student body?
80% of Cinnabar Charter students are Hispanic, 15% of students are White, 3% of students are Two or more races, 1% of students are American Indian, and 1% of students are Black.
What is the student-teacher ratio of Cinnabar Charter?
Cinnabar Charter has a student ration of 17:1, which is lower than the California state average of 21:1.
What grades does Cinnabar Charter offer ?
Cinnabar Charter offers enrollment in grades Kindergarten-8
What school district is Cinnabar Charter part of?
Cinnabar Charter is part of Cinnabar Elementary School District.

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Quick Facts (2026)

  • School Type: Charter School
  • Grades: Kindergarten-8
  • Enrollment: 156 students
  • Student-Teacher Ratio: 17:1
  • Minority Enrollment: 85%
  • : Bottom 50%
  • : 25-29% (Btm 50%)
  • : 30-34% (Btm 50%)
  • : 11-19% (Btm 50%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

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