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Cinnabar Elementary


At a glance
896thof 968 California districts▲ 532
Better than 7% of California districts
Elementary 2Grades K-6
286 Skillman Ln.
Petaluma, CA 94952-1226
·(707) 765-4345·All California district rankings →
Statewide performance 2017–2026
2026: better than 7.5% of districts
2
Schools
176
Students
Top rankedCinnabar Charter4833rd of 5,804 California elementary schools
Summary:

The two schools in this area enroll 176 students: Cinnabar Charter serves kindergarten through grade 6 and has 156 students, while Cinnabar Elementary serves kindergarten and has 20. Only the charter has reported achievement results, so there is no academic comparison between the two schools. In 2025–2026, the charter’s proficiency was 30% in ELA, 19% in math, and 29% in science, compared with California’s 49%, 38%, and 36%. The central finding is that the charter was below the state in all three subjects, with the largest gaps in ELA and math.

The clearest relative bright spot is grade 5 at Cinnabar Charter: ELA proficiency was 39% versus 49% statewide, and math was 25% versus 37%. By contrast, grade 4 had the charter’s lowest ELA result, 16%, and grade 6 its lowest math result, 5%. For attendance, Cinnabar Elementary stands out for the higher chronic absenteeism rate: 28%, compared with 21% at the charter and 18% statewide. Both schools were above the state rate; the kindergarten school was 10 percentage points above it, and the charter was 3 points above.

Results improved unevenly at the charter from 2024–2025 to 2025–2026: science proficiency rose by 13 percentage points and math by 2, while ELA was essentially flat. SchoolDigger places the charter at the 17th percentile and gives it one star in 2025–2026; its percentile ranking has fluctuated slightly, from the 15th percentile in 2023–2024 to the 19th in 2024–2025, then down to 17th. Context also differs: the student–teacher ratios were 16.4 at the charter and 20.0 at the kindergarten school in 2024–2025. For that same year, free/reduced lunch eligible was 83% at the charter and 65% at the kindergarten school; these figures describe the schools’ context, not the cause of their results.

Ranking:
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E Elementary M Middle H High A Alternative P Private




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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

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