Cinnabar Charter

286 Skillman Ln.
Petaluma, CA 94952
(School attendance zone shown in map)
4/
10
Bottom 50%
Serving 160 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 20-24% (which is lower than the California state average of 33%). 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 16:1 is lower than the California state level of 21:1.
Minority enrollment is 82% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).

Quick Stats (2025)

  • School Type: Charter School
  • Grades: Kindergarten-8
  • Enrollment: 160 students
  • Student:Teacher Ratio: 16:1
  • Minority Enrollment: 82%
  • : Bottom 50% in CA
  • : 20-24% (Btm 50%)
  • : 30-34% (Btm 50%)
  • : 11-19% (Btm 50%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

Top Rankings

Cinnabar Charter ranks among the top 20% of public schools in California for:

School Overview

Cinnabar Charter's student population of 160 students has declined by 35% over five school years.
The teacher population of 10 teachers has declined by 9% over five school years.
School Type
Grades Offered
Grades Kindergarten-8
Total Students
160 students
This chart displays total students of Cinnabar Charter by year, with the latest 2022-23 school year data.
Gender %
This chart displays gender of Cinnabar Charter
Total Classroom Teachers
10 teachers
This chart displays the total teachers of Cinnabar Charter by year, with the latest 2022-23 school year data.
Students by Grade
This chart displays the students of Cinnabar Charter by grade.
School Calendar

School Rankings

Cinnabar Charter ranks within the bottom 50% of all 9,602 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Cinnabar Charter is 0.39, 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)
#6081 out of 9602 schools
(Bottom 50%)
This chart displays the overall school rank of Cinnabar Charter, with the latest 2021-22 school year data.
20-24%
33%
This chart displays the percentage of students that scored at or above 'proficient' levels in Math of Cinnabar Charter and the percentage of public school students that scored at or above 'proficient' levels in Math of public schools in California by year, with the latest 2021-22 school year data.
30-34%
47%
This chart displays the percentage of students that scored at or above 'proficient' levels in Reading/Language Arts of Cinnabar Charter and the percentage of public school students that scored at or above 'proficient' levels in Reading/Language Arts of California by year, with the latest 2021-22 school year data.
11-19%
29%
Student : Teacher Ratio
16:1
21:1
This chart displays the student teacher ratio of Cinnabar Charter and the public school average student teacher ratio of California by year, with the latest 2022-23 school year data.
American Indian
n/a
1%
Asian
n/a
12%
This chart displays the percentage of Asian students in Cinnabar Charter and the percentage of Asian public school students in California by year, with the latest 2015-16 school year data.
Hispanic
76%
56%
This chart displays the percentage of Hispanic students in Cinnabar Charter and the percentage of Hispanic public school students in California by year, with the latest 2022-23 school year data.
Black
1%
5%
This chart displays the percentage of Black students in Cinnabar Charter and the percentage of Black public school students in California by year, with the latest 2022-23 school year data.
White
18%
20%
This chart displays the percentage of White students in Cinnabar Charter and the percentage of White public school students in California by year, with the latest 2022-23 school year data.
Hawaiian
1%
n/a
This chart displays the percentage of Hawaiian students in Cinnabar Charter and the percentage of Hawaiian public school students in California by year, with the latest 2011-12 school year data.
Two or more races
4%
6%
This chart displays the percentage of students of two or more races in Cinnabar Charter and the percentage of public school students of two or more races in California by year, with the latest 2022-23 school year data.
All Ethnic Groups
This chart displays the percentage breakdown of students of all ethnic groups in Cinnabar Charter.
This chart displays the percentage breakdown of public school students of all ethnic groups in California.
0.39
This chart displays the diversity score of Cinnabar Charter and the public school average diversity score of California by year, with the latest 2022-23 school year data.
Eligible for Free Lunch
63%
54%
This chart displays the percentage of students who is eligible for free lunch in Cinnabar Charter and the percentage of public school students who is eligible for free lunch in California by year, with the latest 2022-23 school year data.
Eligible for Reduced Lunch
21%
8%
This chart displays the percentage of students who is eligible for reduced lunch in Cinnabar Charter and the percentage of public school students who is eligible for reduced lunch in California by year, with the latest 2022-23 school year data.
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Profile last updated:

Frequently Asked Questions

What is Cinnabar Charter's ranking?
Cinnabar Charter is ranked #6081 out of 9,602 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?
20-24% of students have achieved math proficiency (compared to the 33% 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?
160 students attend Cinnabar Charter.
What is the racial composition of the student body?
76% of Cinnabar Charter students are Hispanic, 18% of students are White, 4% of students are Two or more races, 1% of students are Black, and 1% of students are Hawaiian.
What is the student:teacher ratio of Cinnabar Charter?
Cinnabar Charter has a student ration of 16:1, 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 Stats (2025)

  • School Type: Charter School
  • Grades: Kindergarten-8
  • Enrollment: 160 students
  • Student:Teacher Ratio: 16:1
  • Minority Enrollment: 82%
  • : Bottom 50%
  • : 20-24% (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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