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Cinnabar Charter

Public, Charter Grades K-6

4833^rd

SchoolDigger Rank ?

of 5,804 California Elementary Schools

Better than 17% of California elementary schools

Summary

Cinnabar Charter is a K–6 elementary school in Petaluma, serving 156 students in an area with several nearby elementary-school options. Its most important challenge is math: in 2025–26, 19% of students were proficient, 20 percentage points below the state and 36 points below the average for six nearby K–6 schools.

Science is the school’s strongest subject relative to the state and nearby schools, though results remain low overall. In 2025–26, proficiency was 29% in science and 30% in English language arts (ELA), compared with 35% and 49% statewide; math proficiency was 19%, versus 38% statewide. The school was 7 points below the state in science and 19 points below in ELA. Across six nearby K–6 schools with results, averages were 46% in science, 59% in ELA and 55% in math, putting Cinnabar 16, 29 and 36 points below those averages, respectively. It was below all six peers in ELA and math; in science, it was above one and below five. The supplied figures for the Cinnabar Elementary district match the school’s results in all three subjects, so they do not offer a higher district benchmark.

Results have changed unevenly: from 2022–23 to 2025–26, science rose 9 points and ELA rose 4, while math fell 6 points and its gap to the state widened by 10 points. SchoolDigger ranked the school at the 17th percentile with 1 star in 2025–26; nearby schools with ranking data averaged the 73rd percentile, and Cinnabar’s own ranking fell 27 points from 2018–19. Context includes a 16.4 student-teacher ratio in 2024–25, below the nearby K–6 range of 19.3–26.2, and 83% free/reduced lunch eligible that year, compared with 13%–67% at nearby schools with the same measure. One notable subgroup result: SchoolDigger ranked English Language Learner Students at the 71st percentile in 2023–24, compared with the school’s overall 15th percentile that year, suggesting a relative strength in how the school serves this group. With 156 students, results may be sensitive to changes in the tested group.

156

Students ?

16.4

Student/teacher ratio ?

$16,354

Per pupil spending ?

83.3%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

286 Skillman Ln.
Petaluma, CA 94952-1226

(707) 765-4345

District: Cinnabar Elementary

Students who attend Cinnabar Charter usually attend:

Middle:	Petaluma Junior High
High:	Petaluma High

Racial breakdown:

Hispanic:

80.1%

White:

14.7%

Two or more races:

3.2%

See top rated California elementary schools

Compare Cinnabar Charter to nearby elementary schools!

At a glance

▼ Ranking trend: Declining — 44th percentile in 2015 → 17th in 2026

Worth a look

!Test scores below the California average (25% vs 42% meeting standards)

!In the lower quartile statewide (17th percentile)

!Ranking has slipped — down 27 percentile points since 2015

Students meeting standards (2025-2026) ?

This school25%

District avg25%

California avg42%

4,833^rd of 5,804

California public elementary schools ?

Bottom 17%▼ down 38 pts since 2016

From top 45% (2016) to bottom 17% (2026)

See the entire ranking list of California Elementary Schools →

★★★★★

SchoolDigger rating ?

896^th of 968Cinnabar Elementary among California districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Elementary school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2026	19.6	4833 of 5804	16.7%	★☆☆☆☆
2025	21.3	4719 of 5857	19.4%	★☆☆☆☆
2024	18.4	4994 of 5869	14.9%	★☆☆☆☆
2023	24.7	4382 of 5859	25.2%	★☆☆☆☆
2022	27.8	4070 of 5883	30.8%	★★☆☆☆
2019	38.8	3257 of 5789	43.7%	★★☆☆☆
2018	39.8	3154 of 5662	44.3%	★★☆☆☆
2017	44.4	2842 of 5692	50.1%	★★★☆☆
2016	49.3	2520 of 5614	55.1%	★★★☆☆
2015	37.6	3163 of 5611	43.6%	★★☆☆☆
2013	74.9	1329 of 5530	76.0%	★★★★☆
2012	51.4	2532 of 5390	53.0%	★★★☆☆
2011	43.1	3020 of 5377	43.8%	★★☆☆☆
2010	30.3	3826 of 5314	28.0%	★☆☆☆☆
2009	31.8	3567 of 5193	31.3%	★★☆☆☆
2008	23.3	4091 of 5113	20.0%	★☆☆☆☆
2007	33.7	3319 of 5113	35.1%	★★☆☆☆
2006	51.5	2115 of 4818	56.1%	★★★☆☆
2005	60.0	1742 of 4822	63.9%	★★★☆☆
2004	53.8	1968 of 4809	59.1%	★★★☆☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2024	55.6	903 of 3162	71.4%	★★★★☆
2023	31.4	2439 of 3245	24.8%	★☆☆☆☆
2022	68.5	513 of 3311	84.5%	★★★★☆
2019	52.1	1142 of 3275	65.1%	★★★☆☆
2018	68.5	595 of 3246	81.7%	★★★★☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	30.0	3863 of 5569	30.6%	★★☆☆☆
2025	27.4	4054 of 5597	27.6%	★☆☆☆☆
2024	20.9	4631 of 5612	17.5%	★☆☆☆☆
2023	22.6	4465 of 5609	20.4%	★☆☆☆☆
2022	19.8	4735 of 5635	16.0%	★☆☆☆☆
2019	48.6	2573 of 5492	53.2%	★★★☆☆
2018	52.0	2376 of 5413	56.1%	★★★☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2026	24.1	4141 of 5085	18.6%	★☆☆☆☆
2025	23.3	4216 of 5107	17.4%	★☆☆☆☆
2024	22.7	4306 of 5107	15.7%	★☆☆☆☆
2023	23.4	4216 of 5087	17.1%	★☆☆☆☆
2022	33.8	3390 of 5084	33.3%	★★☆☆☆
2019	35.6	3273 of 4963	34.1%	★★☆☆☆
2018	46.9	2410 of 4830	50.1%	★★★☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	14.3	5058 of 5412	6.5%	☆☆☆☆☆
2025	16.7	4944 of 5460	9.5%	☆☆☆☆☆
2024	24.6	4407 of 5517	20.1%	★☆☆☆☆
2023	25.4	4266 of 5363	20.5%	★☆☆☆☆
2022	38.5	3128 of 5264	40.6%	★★☆☆☆
2019	54.5	2102 of 5173	59.4%	★★★☆☆
2018	45.9	2623 of 5084	48.4%	★★☆☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	24.1	4356 of 5590	22.1%	★☆☆☆☆
2024	14.5	5194 of 5643	8.0%	☆☆☆☆☆
2023	23.8	4366 of 5638	22.6%	★☆☆☆☆
2022	35.6	3307 of 5663	41.6%	★★☆☆☆
2019	25.3	4156 of 5510	24.6%	★☆☆☆☆
2018	23.3	4248 of 5431	21.8%	★☆☆☆☆

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2025	14.6	2459 of 2761	10.9%	★☆☆☆☆
2024	16.1	2435 of 2783	12.5%	★☆☆☆☆
2023	32.3	1714 of 2781	38.4%	★★☆☆☆
2022	35.4	1606 of 2740	41.4%	★★☆☆☆
2019	49.0	1177 of 2715	56.6%	★★★☆☆
2018	25.0	1813 of 2480	26.9%	★☆☆☆☆
2017	36.1	1511 of 2508	39.8%	★★☆☆☆
2016	45.8	1225 of 2497	50.9%	★★★☆☆
2015	40.3	1329 of 2477	46.3%	★★☆☆☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2023	31.7	1134 of 1521	25.4%	★☆☆☆☆
2022	76.2	140 of 1540	90.9%	★★★★★

Female

Year	Avg score	Statewide rank	California percentile	Rating
2023	26.8	1792 of 2531	29.2%	★☆☆☆☆
2022	28.8	1696 of 2509	32.4%	★★☆☆☆
2019	53.1	978 of 2380	58.9%	★★★☆☆
2018	24.3	1695 of 2262	25.1%	★☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2025	23.4	1888 of 2395	21.2%	★☆☆☆☆
2024	21.8	1948 of 2388	18.4%	★☆☆☆☆
2023	23.3	1884 of 2374	20.6%	★☆☆☆☆
2022	36.5	1406 of 2359	40.4%	★★☆☆☆
2019	49.4	958 of 2213	56.7%	★★★☆☆
2018	33.3	1383 of 2072	33.3%	★★☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2025	23.9	2000 of 2542	21.3%	★☆☆☆☆
2024	22.4	2089 of 2579	19.0%	★☆☆☆☆
2023	34.5	1554 of 2531	38.6%	★★☆☆☆
2022	58.5	770 of 2458	68.7%	★★★☆☆
2019	67.3	557 of 2369	76.5%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2023	34.3	1518 of 2538	40.2%	★★☆☆☆
2022	42.7	1258 of 2527	50.2%	★★★☆☆
2019	45.3	1143 of 2407	52.5%	★★★☆☆
2018	25.2	1681 of 2273	26.0%	★☆☆☆☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2022	34.3	1025 of 1555	34.1%	★★☆☆☆
2019	48.4	811 of 1602	49.4%	★★☆☆☆
2018	12.3	1349 of 1496	9.8%	☆☆☆☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Elementary school

English Language Learner (2024)71st percentile+57 vs school

Female (2026)31st percentile+14 vs school

Male (2026)22nd percentile+5 vs school

Hispanic (2026)19th percentile~ school

Low Socio Economic Status (2026)7th percentile-10 vs school

Middle school

Male (2023)40th percentile~ school

White (2022)34th percentile-7 vs school

Female (2023)29th percentile-9 vs school

English Language Learner (2023)25th percentile-13 vs school

Low Socio Economic Status (2025)21st percentile+10 vs school

Hispanic (2025)21st percentile+10 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy30%-19 vs state

Science29%-7 vs state

Mathematics19%-20 vs state

5.0

1 rating · 1 written review

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What people are saying

by a parent
Monday, August 24, 2020

My Children were late starting school do to situations beyond our control, so they started at a lower grade for their age group. Cinnabar never hesitated to help get them started and placed them in the appropriate grades that were needed for each of my children. None of the staff or teachers ever looked down at my children or myself and have been very supportive to us and made me feel just as important and appreciated as all the other parents and kids. they have been a real help for us, and I know my children are safe and learning to the best of their abilities, with room to grow at the right pace. I strongly recommend Cinnabar School to EVERYONE I know who have children. Close Quote

Schools Near Cinnabar Charter

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Immunizations Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CSA Spanish Overall (2026)		CSA Spanish Listening (2026)		CSA Spanish Writing (2026)		CSA Spanish Reading (2026)		CAST Science (2026)			Smarter Balanced Assessments English Language Arts/Literacy (2026)							Smarter Balanced Assessments Mathematics (2026)							% Completely Immunized (2022)	% Polio (2022)	% Hepatitis B (2022)	% Varicella (2022)	% DTP (2022)	% MMR (2022)	Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/reduced lunch (2024-25)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	CSA Spanish Overall 7th Grade	CSA Spanish Overall All Grades	CSA Spanish Listening 7th Grade	CSA Spanish Listening All Grades	CSA Spanish Writing 7th Grade	CSA Spanish Writing All Grades	CSA Spanish Reading 7th Grade	CSA Spanish Reading All Grades	CAST Science 5th Grade	CAST Science 8th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 3rd Grade	Smarter Balanced Assessments English Language Arts/Literacy 4th Grade	Smarter Balanced Assessments English Language Arts/Literacy 5th Grade	Smarter Balanced Assessments English Language Arts/Literacy 6th Grade	Smarter Balanced Assessments English Language Arts/Literacy 7th Grade	Smarter Balanced Assessments English Language Arts/Literacy 8th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 3rd Grade	Smarter Balanced Assessments Mathematics 4th Grade	Smarter Balanced Assessments Mathematics 5th Grade	Smarter Balanced Assessments Mathematics 6th Grade	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	Smarter Balanced Assessments Mathematics All Grades	% Completely Immunized KG	% Polio KG	% Hepatitis B KG	% Varicella KG	% DTP KG	% MMR KG	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Cinnabar Charter	Public, Charter	K-6	286 Skillman Ln.	Petaluma	94952	Sonoma County	Cinnabar Elementary	Yes	(n/a)	No	(n/a)	(707) 765-4345	156	9	16.4	83.3%	23 (14.7%)	1 (0.6%)	125 (80.1%)	0 (0.0%)	1 (0.6%)	1 (0.6%)	5 (3.2%)	19.6	4833^rd of 5804 public elementary schools	16.7%		21.3	4719^th of 5857 public elementary schools	19.4%	114									25.0	38.5	29.3	25.0	15.8	39.3	21.1	33.3	46.2	29.9	18.8	10.5	25.0	5.3	16.7	38.5	18.7							$16,354	$15,906	$448
Cinnabar Elementary	Public	K	286 Skillman Ln.	Petaluma	94952	Sonoma County	Cinnabar Elementary	No	(n/a)	No	(n/a)	(707) 765-4345	20	1	20.0	65.0%	4 (20.0%)	0 (0.0%)	15 (75.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (5.0%)								(n/a)																																$19,810	$19,362	$448
Mary Collins Charter School at Cherry Valley	Public, Charter	K-8	1001 Cherry St.	Petaluma	94952	Sonoma County	Petaluma Joint Union High	Yes	(n/a)	No	(n/a)	(707) 778-4740	494	19	26.2	26.5%	359 (72.7%)	1 (0.2%)	59 (11.9%)	6 (1.2%)	4 (0.8%)	0 (0.0%)	61 (12.3%)	80.9	1092^nd of 5804 public elementary schools	81.2%		72	1516^th of 5857 public elementary schools	74.1%	424									51.7	51.2	51.5	55.3	66.7	67.2	69.8	72.7	65.9	66.7	59.6	68.4	50.0	47.6	45.5	41.5	52.3	76.9	82.7	84.6	84.6	88.5	84.6	$22,158	$21,634	$524
Meadow Elementary	Public	K-6	880 Maria Dr.	Petaluma	94954	Sonoma County	Waugh Elementary	No	(n/a)	No	(n/a)	(707) 762-4905	384	17	22.1	13.3%	226 (58.9%)	3 (0.8%)	77 (20.1%)	21 (5.5%)	0 (0.0%)	2 (0.5%)	55 (14.3%)	91	587^th of 5804 public elementary schools	89.9%		93.2	461^st of 5857 public elementary schools	92.1%	126									60.4		60.4	65.2	83.0	73.6	69.7			72.9	73.9	75.9	58.5	65.2			68.0	95.0	95.0		96.7	95.0	96.7	$19,743	$19,692	$51
Corona Creek Elementary	Public	K-6	1851 Hartman Ln.	Petaluma	94954	Sonoma County	Waugh Elementary	No	(n/a)	No	(n/a)	(707) 765-3331	403	18	21.9	14.4%	254 (63.0%)	6 (1.5%)	95 (23.6%)	22 (5.5%)	2 (0.5%)	0 (0.0%)	23 (5.7%)	81.1	1077^th of 5804 public elementary schools	81.4%		79.2	1188^th of 5857 public elementary schools	79.7%	111									54.2		54.2	51.2	76.2	76.3	60.7			67.4	44.2	77.8	61.0	44.6			58.4	94.3		95.7				$19,127	$19,078	$49
Wilson Elementary	Public	K-6	3775 Bodega Ave.	Petaluma	94952	Sonoma County	Wilmar Union Elementary	No	(n/a)	No	(n/a)	(707) 765-4340	235	10	23.4	20.0%	184 (78.3%)	4 (1.7%)	40 (17.0%)	3 (1.3%)	3 (1.3%)	0 (0.0%)	1 (0.4%)	62.1	1976^th of 5804 public elementary schools	66.0%		67.1	1740^th of 5857 public elementary schools	70.3%	236									42.3		42.3	56.4	47.5	64.3	38.5			51.9	44.7	50.0	42.9	46.2			46.2							$33,347	$33,050	$297
Valley Vista Elementary	Public	K-6	730 North Webster St.	Petaluma	94952	Sonoma County	Petaluma City Elementary	No	(n/a)	No	(n/a)	(707) 778-4762	155	8	19.3	66.5%	54 (34.8%)	0 (0.0%)	81 (52.3%)	3 (1.9%)	3 (1.9%)	4 (2.6%)	10 (6.5%)								(n/a)																										92.6	96.3	96.3	94.4	94.4	96.3	$32,846	$31,574	$1,272
Valley Vista Public Waldorf	Public, Charter	K-8	730 North Webster Ave.	Petaluma	94952	Sonoma County	Petaluma City Elementary	Yes	(n/a)	(n/a)	(n/a)	(707) 778-4762	0			—															(n/a)									47.4	51.6	49.3	42.6	32.7	50.0	51.0	64.3	64.5	48.6	37.0	25.0	23.7	27.5	28.6	35.5	29.6
McKinley Elementary	Public	K-6	110 Ellis St.	Petaluma	94952	Sonoma County	Petaluma City Elementary	No	(n/a)	No	(n/a)	(707) 778-4750	368	15	24.5	50.8%	125 (34.0%)	6 (1.6%)	172 (46.7%)	26 (7.1%)	6 (1.6%)	2 (0.5%)	29 (7.9%)	46.4	2819^th of 5804 public elementary schools	51.4%		43.7	2967^th of 5857 public elementary schools	49.3%	148									26.7		26.7	35.3	51.8	41.3	43.6			43.9	26.5	46.4	37.8	35.5			37.6	84.4	89.1		90.6	87.5	87.5	$23,332	$22,356	$976
Sonoma Mountain Elementary	Public, Charter	K-6	1900 Rainier Cir.	Petaluma	94954	Sonoma County	Old Adobe Union	Yes	(n/a)	No	(n/a)	(707) 765-4305	422	17	24.8	15.4%	294 (69.7%)	1 (0.2%)	60 (14.2%)	22 (5.2%)	3 (0.7%)	0 (0.0%)	42 (10.0%)	95.5	286^th of 5804 public elementary schools	95.1%		93.3	451^st of 5857 public elementary schools	92.3%	165									66.7		66.7	87.5	83.1	73.3	78.0			80.3	87.5	84.8	70.0	66.1			76.9							$25,155	$24,044	$1,111

Frequently Asked Questions about Cinnabar Charter

How many students attend Cinnabar Charter?

In the 2024-25 school year, 156 students attended Cinnabar Charter.

What is the racial makeup of Cinnabar Charter?

Students at Cinnabar Charter are 80% Hispanic, 15% White, 3% Two or more races.

What district is Cinnabar Charter in?

Cinnabar Elementary

What schools do graduates of Cinnabar Charter attend?

Students who attend Cinnabar Charter usually go on to attend:

Middle : Petaluma Junior High
High : Petaluma High

Is Cinnabar Charter a good school?

Cinnabar Charter ranks in the bottom 16.7% of California elementary schools.

Rate Cinnabar Charter!

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Latest California data All new data »

2025–26 attendance data, dropout rates & graduation ratesNewOct 15, 2026

2025–26 CAST, CSA Spanish & Smarter Balanced Assessments scoresNewOct 15, 2026

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 2026

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

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.