No UC admissions data on file for Cinnabar Charter.
This school doesn't appear in UCOP's source-school records (it may send few or no applicants to UC). Its enrollment trend and similar-school comparison are still below.
Compare with peers
Most similar nearby schools
River Montessori Elementary Charter → Petaluma Accelerated Charter → Dunham Charter → Live Oak Charter → Tomales High School → Compare all similar →📋 At a glance
- 🎓 AP rigor: Bottom 6% of US high schools
Composed from federal CRDC offerings, EDFacts ACGR, and other public data. Full breakdowns below.
How Cinnabar Charter compares for families
What families should know about Cinnabar Charter.
- ▸ vs Similar SchoolsThe closest comparables nearby: River Montessori Elementary Charter, Petaluma Accelerated Charter, Dunham Charter and 2 more. See the sidebar to compare side-by-side.
For Parents
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Get an email when Cinnabar Charter's numbers change — new admissions results, enrollment shifts, test scores. A few updates a year, no spam.
SAT / ACT participation
CRDC federal data · 2020-21Source: federal Civil Rights Data Collection (CRDC 2020-21). Volume — not score — is what's reported here. A higher count means more students at this school are entering the college admissions pipeline. Note: 2020-21 was COVID-disrupted; some districts (especially those that stayed remote longer) report unusually low or zero takers.
Chronic absenteeism — 2024-25
Share of students missing 10% or more of expected attendance — the leading indicator that often precedes the demand decline shown above. Families disengaging tend to raise absenteeism first, then formally leave. Basis: total enrollment.
Absenteeism is up 12.9 pp since 2016-17. A rising absenteeism trend often precedes formal departure — worth investigating which subgroups are driving it.
Source: California Department of Education, Chronic Absenteeism 2024-25. Benchmarks limited to non-virtual public & charter HS with ≥100 eligible students. CDE didn't publish a usable 2019-20 file (COVID).
Enrollment trend & projection
If this trend holds (-7.1%/yr, Total enrollment)
At per-pupil funding of $ / student:
| Horizon | Projected Total enrollment | Change | Funding impact / yr |
|---|---|---|---|
| 1 yr (2027) | ~140 | -11 | $0 |
| 3 yr (2029) | ~121 | -30 | $0 |
| 5 yr (2031) | ~105 | -46 | $0 |
Straight-line extrapolation of the recent annual rate — a what-if, not a forecast of intent. Default = California's LCFF base grant for grades 9–12 ($12,423/ADA). Edit the figure to match your school.
Cinnabar Charter — Enrollment & Outcomes Snapshot
Public · vs. 10 most similar nearby schools
- ▸At its recent rate (-5.8%/yr), enrollment projects to ~126 by 2029 — about 25 fewer students than today.
Enrollment projection
That's about 25 fewer students. At per-student funding of $ per student, that's roughly $0 in annual state funding at risk.
Default = California's LCFF base grant for grades 9–12 ($12,423 per ADA) — adjust to your district's actual per-pupil figure. Projection extrapolates the recent annual rate — not a forecast of intent.
Your school vs. its 10 most similar nearby schools
| School | Type | Size | UC Reach | Enroll. trend |
|---|---|---|---|---|
| Cinnabar Charter | Public | 151 | — | — |
| Peer-group median | 12.2% | +28% | ||
| River Montessori Elementary Charter | Public | 141 | — | — |
| Petaluma Accelerated Charter | Public | 113 | — | — |
| Dunham Charter | Public | 167 | — | — |
| Live Oak Charter | Public | 271 | — | — |
| Tomales High School | Public | 134 | 12.2% | +28% |
| Old Adobe Elementary Charter | Public | 268 | — | — |
| Miwok Valley Elementary Charter | Public | 274 | — | — |
| Kid Street Charter | Public | 122 | — | — |
| Salmon Creek School - A Charter | Public | 139 | — | — |
| Santa Rosa Accelerated Charter | Public | 128 | — | — |
UC Reach = top-6 UC admits ÷ senior class (can exceed 100% when students are admitted to multiple campuses). Enrollment trend = first-to-latest grade-12 change on file. Similar schools matched on proximity, size, type. Methodology →
Enrollment stability & demand — 2024-25
Two complementary signals: retention (do students stay once enrolled?) and demand (are families choosing the school?). Read against the Sonoma County baseline — the demographic tide is moving every CA HS, so a school's gap vs. county is the actionable signal.
19 of 167 students who enrolled at Cinnabar Charter this year didn't maintain continuous enrollment (11.4% non-stability). Mid-year transfers, dropouts, and other exits are all counted.
Stability by student group
Nearest peer high schools
Source: California Department of Education, Stability Rate 2024-25. Benchmarks limited to non-virtual public & charter HS with ≥100 cumulative enrollees so by-design-high-churn continuation schools don't dominate the bottom of the distribution. Cumulative enrollment counts every student on the rolls during the year, so it can exceed peak-day enrollment.
For School Admins
The full Reach Report for Cinnabar Charter
A board- and LCAP-ready intelligence brief: your enrollment retention and college outcomes, benchmarked against your closest competitors, with a 5-year forecast, concrete steps to act on, and the rigor + outcomes story you can share with your families. Built from primary public data — prepared for you, not auto-generated.
- ✓Your 5-year enrollment forecast (currently -7.1%/yr) with the revenue at stake
- ✓Student-retention benchmarking vs your county median — and the LCAP evidence to back your goals