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Twin Hills Charter Middle

Q: Is Twin Hills Charter Middle a good school?

Twin Hills Charter Middle ranks 524 th of 2703 California middle schools. SchoolDigger rates this school 4 stars out of 5.

Public, Charter Grades 6-8

524^th

SchoolDigger Rank ?

of 2,703 California Middle Schools

Better than 81% of California middle schools

Summary

Twin Hills Charter Middle serves 207 students in grades 6–8 in Sebastopol, California. In 2025–2026, its proficiency rates were above California’s in English language arts (ELA), math and science. Science stands out as the school’s clearest strength, while ELA deserves the closest attention. The most important concern is that ELA proficiency has fallen 16 percentage points since 2022–2023, to 58%, and is now below the district’s 62%.

Compared with the other nearby schools serving grades 6–8, Twin Hills had the strongest science results: 54%, versus an average of 30% at Technology Middle, Lawrence E. Jones Middle and Hillcrest Middle. It was second among those schools in ELA and math. ELA was 58%, below the district but above the state’s 49%; Hillcrest led nearby peers at 67%. Math was 55%, above the district’s 51% and state’s 38%. However, results varied considerably by grade, from 40% in grade 6 to 70% in grade 8.

ELA has weakened more than the other subjects: math declined 2 percentage points and science 2 points from 2022–2023 to 2025–2026, while science rebounded to 54% in the latest year. SchoolDigger rated Twin Hills at the 81st percentile and four stars in 2025–2026, down from the 90th percentile in 2022–2023; the Twin Hills Union Elementary district ranked at the 84th percentile. The 2024–2025 student-teacher ratio was 16.9, and 21% of students were free/reduced lunch eligible. SchoolDigger’s statewide ranking for how well the school serves students receiving special education was at the 53rd percentile in 2025–2026, down from the 80th percentile the prior year. Its ranking for how well it serves Hispanic students was at the 72nd percentile, down from the 87th percentile in 2024–2025.

207

Students ?

16.9

Student/teacher ratio ?

$30,229

Per pupil spending ?

21.3%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

1685 Watertrough Rd.
Sebastopol, CA 95472-4647

(707) 823-7446

District: Twin Hills Union Elementary

Students who attend Twin Hills Charter Middle usually attend:

High:

Analy High

Feeder schools for Twin Hills Charter Middle:

Elementary:

Apple Blossom

Racial breakdown:

White:

58.0%

Hispanic:

24.2%

Two or more races:

15.0%

See top rated California middle schools

Compare Twin Hills Charter Middle to nearby middle schools!

At a glance

▬ Ranking trend: Holding steady — 81st percentile in 2015 → 81st in 2026

Strengths

✓Test scores above the California average (56% vs 42% meeting standards)

✓Ranks in the top 19% of California middle schools

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2025-2026) ?

This school56%

District avg56%

California avg42%

524^th of 2,703

California public middle schools ?

Top 19%▲ up 11 pts since 2016

From top 30% (2016) to top 19% (2026)

See the entire ranking list of California Middle Schools →

★★★★★

SchoolDigger rating ?

156^th of 968Twin Hills Union 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)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2026	76.9	524 of 2703	80.6%	★★★★☆
2025	83.1	413 of 2761	85.0%	★★★★☆
2024	87.4	338 of 2783	87.9%	★★★★☆
2023	90.6	268 of 2781	90.4%	★★★★★
2022	83.0	419 of 2740	84.7%	★★★★☆
2019	82.6	423 of 2715	84.4%	★★★★☆
2018	75.8	515 of 2480	79.2%	★★★★☆
2017	80.1	457 of 2508	81.8%	★★★★☆
2016	64.9	760 of 2497	69.6%	★★★☆☆
2015	77.6	476 of 2477	80.8%	★★★★☆
2013	89.2	105 of 2379	95.6%	★★★★★
2012	89.2	99 of 2259	95.6%	★★★★★
2011	89.9	91 of 2236	95.9%	★★★★★
2010	88.5	125 of 2179	94.3%	★★★★★
2009	85.8	170 of 2063	91.8%	★★★★★
2008	83.4	228 of 2005	88.6%	★★★★☆
2007	84.8	218 of 1999	89.1%	★★★★☆
2006	79.6	300 of 1804	83.4%	★★★★☆
2005	85.0	201 of 1777	88.7%	★★★★☆
2004	88.5	142 of 1769	92.0%	★★★★★

Disabled

Year	Avg score	Statewide rank	California percentile	Rating
2019	98.1	27 of 1491	98.2%	★★★★★

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	78.0	469 of 2483	81.1%	★★★★☆
2025	83.7	365 of 2533	85.6%	★★★★☆
2024	87.7	289 of 2551	88.7%	★★★★☆
2023	92.2	189 of 2531	92.5%	★★★★★
2022	82.0	396 of 2509	84.2%	★★★★☆
2019	83.3	361 of 2380	84.8%	★★★★☆
2018	75.0	499 of 2262	77.9%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2026	64.3	651 of 2325	72.0%	★★★★☆
2025	80.6	306 of 2395	87.2%	★★★★☆
2024	81.1	304 of 2388	87.3%	★★★★☆
2023	86.3	202 of 2374	91.5%	★★★★★
2022	90.3	134 of 2359	94.3%	★★★★★
2019	78.3	337 of 2213	84.8%	★★★★☆
2018	80.8	266 of 2072	87.2%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	70.0	549 of 2493	78.0%	★★★★☆
2025	90.5	163 of 2542	93.6%	★★★★★
2024	86.6	238 of 2579	90.8%	★★★★★
2023	94.5	88 of 2531	96.5%	★★★★★
2022	78.4	328 of 2458	86.7%	★★★★☆
2019	78.3	341 of 2369	85.6%	★★★★☆
2018	70.8	460 of 2230	79.4%	★★★★☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	70.2	614 of 2478	75.2%	★★★★☆
2025	78.9	450 of 2534	82.2%	★★★★☆
2024	83.4	369 of 2552	85.5%	★★★★☆
2023	84.5	351 of 2538	86.2%	★★★★☆
2022	80.8	428 of 2527	83.1%	★★★★☆
2019	77.3	480 of 2407	80.1%	★★★★☆
2018	74.0	522 of 2273	77.0%	★★★★☆

Multi-racial

Year	Avg score	Statewide rank	California percentile	Rating
2026	70.4	223 of 734	69.6%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2026	43.2	751 of 1586	52.6%	★★★☆☆
2025	66.6	313 of 1566	80.0%	★★★★☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2026	62.2	537 of 1482	63.8%	★★★☆☆
2025	67.3	480 of 1520	68.4%	★★★☆☆
2024	72.4	381 of 1537	75.2%	★★★★☆
2023	76.4	305 of 1543	80.2%	★★★★☆
2022	64.1	515 of 1555	66.9%	★★★☆☆
2019	67.0	503 of 1602	68.6%	★★★☆☆
2018	57.8	634 of 1496	57.6%	★★★☆☆

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)

Disabled (2019)98th percentile+14 vs school

Female (2026)81st percentile~ school

Low Socio Economic Status (2026)78th percentile-3 vs school

Male (2026)75th percentile-5 vs school

Hispanic (2026)72nd percentile-9 vs school

Multi-racial (2026)70th percentile-11 vs school

White (2026)64th percentile-17 vs school

Special Education (2026)53rd percentile-28 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy58%+8 vs state

Mathematics55%+17 vs state

Science54%+18 vs state

★

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Schools Near Twin Hills Charter Middle

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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 Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CAST Science (2026)			Smarter Balanced Assessments English Language Arts/Literacy (2026)							Smarter Balanced Assessments Mathematics (2026)							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	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	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Twin Hills Charter Middle	Public, Charter	6-8	1685 Watertrough Rd.	Sebastopol	95472	Sonoma County	Twin Hills Union Elementary	Yes	(n/a)	No	(n/a)	(707) 823-7446	207	12	16.9	21.3%	120 (58.0%)	1 (0.5%)	50 (24.2%)	2 (1.0%)	0 (0.0%)	0 (0.0%)	31 (15.0%)	76.9	524^th of 2703 public middle schools	80.6%		83.1	413^th of 2761 public middle schools	85.0%	111		54.0	54.0				60.2	56.8	56.3	57.8				39.8	54.3	70.1	55.0	$30,229	$29,898	$331
Brook Haven Middle	Public	5-8	7905 Valentine Ave.	Sebastopol	95472	Sonoma County	Sebastopol Union Elementary	No	(n/a)	No	(n/a)	(707) 829-4590	212	11	18.7	43.4%	90 (42.5%)	1 (0.5%)	78 (36.8%)	4 (1.9%)	1 (0.5%)	0 (0.0%)	36 (17.0%)	53.7	1073^rd of 2703 public middle schools	60.3%		64.6	797^th of 2761 public middle schools	71.1%	276	36.4	35.3	35.7			57.6	53.5	55.9	52.9	54.7			39.4	34.7	33.9	21.6	32.1	$22,263	$20,876	$1,387
Hillcrest Middle	Public, Charter	6-8	725 Bloomfield Rd.	Sebastopol	95472	Sonoma County	Gravenstein Union Elementary	Yes	(n/a)	No	(n/a)	(707) 823-7653	297	18	16.8	30.0%	180 (60.6%)	1 (0.3%)	74 (24.9%)	13 (4.4%)	0 (0.0%)	2 (0.7%)	26 (8.8%)	84	385^th of 2703 public middle schools	85.8%		90.7	260^th of 2761 public middle schools	90.6%	125		44.4	44.4				69.3	71.4	60.7	67.5				55.7	63.4	53.9	58.1	$31,215	$30,972	$243
Salmon Creek School - A Charter	Public, Charter	2-8	1935 Bohemian Hwy.	Occidental	95465	Sonoma County	Harmony Union Elementary	Yes	(n/a)	No	(n/a)	(707) 874-1205	162	9	18.5	24.7%	113 (69.8%)	0 (0.0%)	26 (16.0%)	2 (1.2%)	0 (0.0%)	0 (0.0%)	18 (11.1%)	65.7	790^th of 2703 public middle schools	70.8%		67.9	718^th of 2761 public middle schools	74.0%	72	52.0	47.4	50.0	94.4	70.0	48.0		72.0	52.6	65.5	77.8	30.0	16.0		36.0	31.6	35.3	$46,734	$46,734	$00
Forestville Academy	Public, Charter	2-8	6321 Highway 116	Forestville	95436	Sonoma County	Forestville Union Elementary	Yes	(n/a)	No	(n/a)	(707) 887-2279	152	10	14.8	40.1%	85 (55.9%)	1 (0.7%)	55 (36.2%)	1 (0.7%)	0 (0.0%)	0 (0.0%)	10 (6.6%)	19	2232^nd of 2703 public middle schools	17.4%		31	1799^th of 2761 public middle schools	34.8%	433	30.0	17.2	22.5	47.1	54.6	42.1	28.6	44.4	34.5	41.3	31.3	40.9	25.0	9.5	11.1	3.5	19.1	$45,928	$41,270	$4,658
Hilliard Comstock Middle	Public	7-8	2750 West Steele Ln.	Santa Rosa	95403	Sonoma County	Santa Rosa High	No	(n/a)	No	(n/a)	(707) 890-3885	423	23	18.0	86.3%	33 (7.8%)	7 (1.7%)	340 (80.4%)	27 (6.4%)	2 (0.5%)	5 (1.2%)	8 (1.9%)	10.3	2550^th of 2703 public middle schools	5.7%		9.7	2623^rd of 2761 public middle schools	5.0%	73		11.8	11.8					19.1	22.2	20.6					10.0	7.7	8.9	$22,796	$21,864	$932
Technology Middle	Public	6-8	7165 Burton Ave.	Rohnert Park	94928	Sonoma County	Cotati-Rohnert Park Unified	No	(n/a)	No	(n/a)	(707) 792-4800	409	24	16.9	65.0%	91 (22.2%)	11 (2.7%)	259 (63.3%)	18 (4.4%)	2 (0.5%)	4 (1.0%)	23 (5.6%)	18.9	2233^rd of 2703 public middle schools	17.4%		11.7	2561^st of 2761 public middle schools	7.2%	328		16.7	16.7				26.6	33.6	38.1	32.2				11.6	13.5	14.2	13.0	$24,334	$23,136	$1,198
Piner-Olivet Charter	Public, Charter	7-8	2707 Francisco Ave.	Santa Rosa	95403	Sonoma County	Piner-Olivet Charter District	Yes	(n/a)	No	(n/a)	(707) 522-3310	212	8	25.5	55.7%	50 (23.6%)	7 (3.3%)	114 (53.8%)	26 (12.3%)	2 (0.9%)	2 (0.9%)	11 (5.2%)								(n/a)
Santa Rosa Junior High	Public	7-8	1235 Mendocino Ave.	Santa Rosa	95401	Sonoma County	Santa Rosa High	No	(n/a)	No	(n/a)	(707) 890-3850	452	24	18.6	76.1%	89 (19.7%)	10 (2.2%)	317 (70.1%)	15 (3.3%)	8 (1.8%)	2 (0.4%)	11 (2.4%)	20.5	2168^th of 2703 public middle schools	19.8%		19.2	2262^nd of 2761 public middle schools	18.1%	94		16.6	16.6					32.0	28.3	30.1					21.3	17.2	19.2	$23,667	$22,430	$1,237
Lawrence E. Jones Middle	Public	6-8	5154 Snyder Ln.	Rohnert Park	94928	Sonoma County	Cotati-Rohnert Park Unified	No	(n/a)	No	(n/a)	(707) 588-5600	775	37	21.0	38.3%	335 (43.2%)	14 (1.8%)	300 (38.7%)	44 (5.7%)	3 (0.4%)	7 (0.9%)	72 (9.3%)	49.3	1187^th of 2703 public middle schools	56.1%		47.4	1252^nd of 2761 public middle schools	54.7%	65		27.4	27.4				47.9	49.6	46.0	47.9				36.0	34.0	34.6	34.8	$20,252	$19,718	$534

Frequently Asked Questions about Twin Hills Charter Middle

What high school do graduates of Twin Hills Charter Middle attend?

Students who attend Twin Hills Charter Middle usually go on to attend Analy High

What district is Twin Hills Charter Middle in?

Twin Hills Union Elementary

What is the racial makeup of Twin Hills Charter Middle?

Students at Twin Hills Charter Middle are 58% White, 24% Hispanic, 15% Two or more races, 1% Not Specified.

How many students attend Twin Hills Charter Middle?

In the 2024-25 school year, 207 students attended Twin Hills Charter Middle.

Is Twin Hills Charter Middle a good school?

Twin Hills Charter Middle ranks 524^th of 2703 California middle schools. SchoolDigger rates this school 4 stars out of 5.

Rate Twin Hills Charter Middle!

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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.