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Below Average

#8773 of 9,533 schools in CA

Cinnabar Charter

Elementary School · Cinnabar Elementary

286 Skillman Ln., Petaluma, CA 94952

Charter

Enrollment

160

Student-Teacher

17.8:1

Score

4.1

Grades

Kindergarten – 8th

Updated 2022-23

How this school compares

In Petaluma

#27 of 30

public schools

California elementary schools

#5,241 of 5,817

School environment

8.8 / 10

Exceptional

About Cinnabar Charter

Cinnabar Charter is a charter school located in Petaluma, California, within Sonoma County. Serving kindergarten through eighth grade students, the school has an enrollment of 160 pupils and maintains a student-teacher ratio of 17.8:1 with nine full-time equivalent teachers. Cinnabar Charter focuses on providing a supportive educational environment for its diverse student body.

The academic performance at Cinnabar Charter shows room for improvement, as indicated by the MySchoolScout rating of 3.2 out of 10 and a state ranking of #8277 out of 9566 schools in California (14th percentile). In terms of standardized test scores, only 27% of students are proficient or above in English Language Arts/Reading, while 16% are proficient or above in Math. Despite these challenges, the school remains committed to fostering an engaging and nurturing learning atmosphere for its students.

Cinnabar Charter is situated in a small suburban area, offering a close-knit community feel with easy access to local amenities and resources.

What Parents Should Know

With an enrollment of 160 students, Cinnabar Charter is a smaller school where families often find a close-knit community atmosphere. Smaller settings can mean more individual attention from teachers and staff, though they may offer fewer extracurricular options than larger schools.

Cinnabar Charter is a charter school — a publicly funded school that operates with more autonomy than traditional district schools. Charter schools often have distinct educational models or specialties. Parents should understand the school's specific mission, enrollment process, and how its approach differs from nearby district options.

Score Breakdown

Full Profile · 3/3 metrics
Student Progress2.1Needs Improvement50%
Year-over-year improvement in student test scores.
View breakdown
Years of Data2
Annual Change-3.52 pts/yr
Data Period2019–2024
TrendDeclining
Academics4.2Below Average30%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency15.5%
Reading/ELA Proficiency25%
Math vs. State Avg-30.2 pts
Reading vs. State Avg-17.8 pts
Overall Proficiency20%
Expected (poverty-adj.)27%
vs. Expected-6.4 pts
Adjusted Percentile23th
College ReadinessNot Available

Data not available for this school

Resources & Environment8.8Excellent20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio17.8:1
Per-Pupil Spending$17,108

Cinnabar Charter — Students at Cinnabar Charter score 20% proficient, which is below what's typical for similar communities (expected: 27%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

84.4%

Students qualifying for federal meal assistance

Test Scores CA CAASPP (2023-24)

Math Proficiency 15.8%
School
State
36.8%
ELA Proficiency 27.4%
School
State
45.8%

Based on 16 test records from CA state assessments. About our data

Proficiency Trend

↓ Declining

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
22%
ELA
52%
2024
Math
14.9%
ELA
23.9%

Source: EdFacts (NCES) and state assessment data. Growth score: 2.1/10.

How Cinnabar Charter Compares

See how Cinnabar Charter performs across key quality dimensions compared to state benchmarks.

Overall Score
4.1/10
8th percentile in CA
Academic
4.2/10
4.2/10
Growth
2.1/10
Below average
Environment
8.8/10
Above average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
84%
Teaching Staff
18:1 student-teacher ratio
9 teachers

Location

286 Skillman Ln., Petaluma, CA 94952

Nearby Alternatives

Families considering Cinnabar Charter may also want to explore other elementary schools in the area. Corona Creek Elementary (rated 7.6/10, 1.4 miles away), which scores notably higher. Another option is Meadow Elementary (rated 7.5/10, 1.2 miles away), which scores notably higher. Additionally, Sonoma Mountain Elementary (rated 7.5/10, 2.0 miles away), which scores notably higher. For more schools in Petaluma, see our Petaluma schools guide .

Nearby Schools

20 within 2.1 mi
School Distance Rating
Cinnabar Elementary Petaluma 0.0 mi
Mary Collins Charter School at Cherry Valley Petaluma 1.2 mi 7.3
Saint Vincent de Paul College Preparatory Petaluma 1.3 mi
ST VINCENT DE PAUL HIGH SCHOOL Petaluma 1.3 mi 7.6
Meadow Elementary Petaluma 1.2 mi 7.5
Corona Creek Elementary Petaluma 1.4 mi 7.6
Wilson Elementary Petaluma 1.5 mi 4.2
Petaluma Junior High Petaluma 1.9 mi 5.4
Kenilworth Junior High Petaluma 1.6 mi 5.9
Valley Vista Elementary Petaluma 1.9 mi 4.2
ST VINCENT DE PAUL ELEMENTARY SCHOOL Petaluma 1.9 mi 4.9
The Spring Hill School Petaluma 2.0 mi
McKinley Elementary Petaluma 2.0 mi 3.0
Petaluma Accelerated Charter Petaluma 2.0 mi 5.9
South County Consortium Petaluma 2.3 mi 6.9
Sonoma Mountain Elementary Petaluma 2.0 mi 7.5
Petaluma High Petaluma 2.4 mi 5.7
Carpe Diem High (Continuation) Petaluma 2.5 mi
BRIGHT SKIES MONTESSORI SCHOOL Penngrove 2.6 mi
Loma Vista Immersion Academy Petaluma 2.1 mi 3.7

Neighborhood Census ACS (2019-2023)

Census data for ZIP 94952 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$115,097

Median Home Value

$1,016,800

Median Rent

$2,272/mo

Population

33,339

College Educated

47.5%

Homeownership

59.9%

Avg Commute

28.3 min

Poverty Rate

6.6%

Median Age

44.5

Community Profile

The community surrounding Cinnabar Charter has a median household income of $115,097. It is a well-educated community where 48% of adults hold a bachelor's degree or higher. The median home value in the area is $1,016,800, with a median rent of $2,272/month. The local poverty rate of 6.6% is relatively low. The average commute for residents is 28 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
COUNTRY CHRISTIAN SCHOOL Bakersfield, CA 4.1
Lake Marie Elementary Whittier, CA 4.1
Richmond Elementary Susanville, CA 4.1
Santa Ynez Valley Charter Santa Ynez, CA 4.1
Achieve Charter School of Chico Chico, CA 4.0
Copperopolis Elementary Copperopolis, CA 4.0

Frequently Asked Questions

Common questions about Cinnabar Charter

What grades does Cinnabar Charter serve?

Cinnabar Charter serves students in grades Kindergarten through 8th.

How many students attend Cinnabar Charter?

Cinnabar Charter has an enrollment of approximately 160 students.

What is the student-teacher ratio at Cinnabar Charter?

The student-teacher ratio at Cinnabar Charter is 17.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.

How does Cinnabar Charter rank in CA?

Cinnabar Charter is ranked #8773 out of 9,533 schools in CA.

What is Cinnabar Charter's MySchoolScout rating?

Cinnabar Charter has a composite rating of 4.1 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

What are the test scores at Cinnabar Charter?

Based on the most recent state assessment data, Cinnabar Charter has 15.8% math proficiency and 27.4% reading/ELA proficiency.

Is Cinnabar Charter a charter school?

Yes, Cinnabar Charter is a charter school. Charter schools are publicly funded but independently operated, often with more flexibility in curriculum and teaching methods.

Is Cinnabar Charter a Title I school?

No, Cinnabar Charter is not currently a Title I school.

What does the Free & Reduced Lunch percentage mean for Cinnabar Charter?

84.4% of students at Cinnabar Charter qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.

11 schools nearby View map →

Neighborhood Context

City Safety
Elevated (1,469/100K)

FBI UCR 2024. City-level (Petaluma). Data >1 year old.

Quick Facts NCES CCD (SY 2022-23)

Grades
Kindergarten – 8th
Enrollment
160
Student-Teacher Ratio
17.8:1
Teachers (FTE)
9
Free/Reduced Lunch
84.4%
Type
regular
Setting
Small Suburb
County
Sonoma County
Data Year
2023–2024

District

Cinnabar Elementary
District Enrollment
176
Schools in District
2
Per-Pupil Spending
$19,638
District Rank
#1 of 1

Other Schools in This District

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

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