River Montessori Elementary Charter

· Sonoma County · Old Adobe Union
Public Sonoma County 🏛 Old Adobe Union → CDS 4970847…
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Compare with peers

Most similar nearby schools

Cinnabar Charter → Petaluma Accelerated Charter → Dunham Charter → Miwok Valley Elementary Charter → Old Adobe Elementary Charter → Compare all similar →

No UC admissions data on file for River Montessori Elementary 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.

Enrollment trend & projection

Total enrollment
166 (2018)141 (2026)
-15.1%

If this trend holds (-2.0%/yr, Total enrollment)

At per-pupil funding of $ / student:

Horizon Projected Total enrollment Change Funding impact / yr
1 yr (2027) ~138 -3 $0
3 yr (2029) ~133 -8 $0
5 yr (2031) ~127 -14 $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.

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.

Stability rate
94.0%
140 of 149 students

9 of 149 students who enrolled at River Montessori Elementary Charter this year didn't maintain continuous enrollment (6.0% non-stability). Mid-year transfers, dropouts, and other exits are all counted.

Sonoma County median
92.0% · school is in the 71st percentile of 59 HS
Statewide median
88.7% · in the 82nd percentile of 2,648 HS

Stability by student group

White (82) 95.1%
Socio. disadvantaged (39) 87.2%
Hispanic / Latino (32) 87.5%
Two or more races (24) 95.8%

Nearest peer high schools

Cinnabar Charter 88.6% Petaluma Accelerated Charter 90.8% Dunham Charter 90.1% Miwok Valley Elementary Charter 93.6% Old Adobe Elementary Charter 91.8%

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.

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.

Chronic absent
11.5%
17 of 148 students

Absenteeism is up 4.8 pp since 2016-17. A rising absenteeism trend often precedes formal departure — worth investigating which subgroups are driving it.

Sonoma County median
17.5% · school is better than 83% of 58 HS
Statewide median
20.9%
Chronic absenteeism by year (raw %)

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).

River Montessori Elementary Charter — Enrollment & Outcomes Snapshot

Public · vs. 10 most similar nearby schools

  • At its recent rate (-2.0%/yr), enrollment projects to ~133 by 2029 — about 8 fewer students than today.

Enrollment projection

141 students (2026)
~133 projected (2029)
at -2.0%/yr

That's about 8 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
River Montessori Elementary Charter Public 141
Peer-group median 12.2% -1%
Cinnabar Charter Public 151
Petaluma Accelerated Charter Public 113
Dunham Charter Public 167
Miwok Valley Elementary Charter Public 274
Old Adobe Elementary Charter Public 268
Live Oak Charter Public 271
Valley Oak High Public 134 -29%
Tomales High School Public 134 12.2% +28%
Sonoma Charter Public 230
Kid Street Charter Public 122

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 →

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