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Twin Hills Charter Middle

Q: Is Twin Hills Charter Middle a good school?

Twin Hills Charter Middle ranks 413 th of 2761 California middle schools. SchoolDigger rates this school 4 stars out of 5.

Public, Charter Grades 6-8

413^th

SchoolDigger Rank ?

of 2,761 California Middle Schools

Better than 85% of California middle schools

Summary

Twin Hills Charter Middle is a well-regarded public charter school serving 207 students in grades 6-8 in Sebastopol, part of the high-performing Twin Hills Union Elementary district.

Academically, the school is a strong and consistent performer, significantly exceeding state averages with 67% of students proficient in English and 55% in Math. It stands out in the region for its exceptional effectiveness with economically disadvantaged students, who rank in the state's 94th percentile. While the school serves a less economically challenged population than many neighbors, its success with this subgroup suggests strong support systems. Compared to nearby schools like Herbert Slater Middle or Hilliard Comstock Middle, Twin Hills maintains a notable academic advantage and lower chronic absenteeism.

An interesting pattern is that 6th graders start with lower math scores that improve dramatically by 7th and 8th grade, indicating significant academic growth. The school operates in an area with other high-performing options like Hillcrest Middle and Salmon Creek School - A Charter, forming a cluster of successful schools. Overall, Twin Hills Charter Middle provides a stable, high-quality education and is particularly effective at supporting vulnerable student groups within its community.

207

Students ?

16.9

Student/teacher ratio ?

$30,229

Per pupil spending ?

21.3%

Free/discounted lunch ?

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: Declining — 96th percentile in 2013 → 85th in 2025

Strengths

✓Test scores above the California average (59% vs 41% meeting standards)

✓Ranks in the top 15% of California middle schools

Worth a look

!Ranking has slipped — down 11 percentile points since 2013

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

Students meeting standards (2024-2025) ?

This school59%

District avg54%

California avg41%

413^th of 2,761

California public middle schools ?

Top 15%▲ up 4 pts since 2015

From top 19% (2015) to top 15% (2025)

See the entire ranking list of California Middle Schools →

★★★★★

SchoolDigger rating ?

259^th of 1,543Twin 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
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
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
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
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
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%	★★★★☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2025	66.6	313 of 1566	80.0%	★★★★☆

White

Year	Avg score	Statewide rank	California percentile	Rating
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

Low Socio Economic Status (2025)94th percentile+9 vs school

Hispanic (2025)87th percentile~ school

Female (2025)86th percentile~ school

Male (2025)82nd percentile-3 vs school

Special Education (2025)80th percentile-5 vs school

White (2025)68th percentile-17 vs school

By subject vs California (2024-2025) ?

English Language Arts/Literacy67%+18 vs state

Mathematics55%+17 vs state

Science49%+17 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 (2025)				Ranking (2024)				CAST Science (2025)			Smarter Balanced Assessments English Language Arts/Literacy (2025)							Smarter Balanced Assessments Mathematics (2025)							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/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	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%)	83.1	413^th of 2761 public middle schools	85.0%		87.4	338^th of 2783 public middle schools	87.9%	75		49.2	49.2				58.3	70.7	70.5	67.0				36.7	62.2	62.3	54.7	$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%)	64.6	797^th of 2761 public middle schools	71.1%		64.9	789^th of 2783 public middle schools	71.6%	8	22.6	47.2	34.9			43.4	60.0	58.0	58.5	55.0			20.8	39.3	28.0	31.5	30.1	$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%)	90.7	260^th of 2761 public middle schools	90.6%		82.4	434^th of 2783 public middle schools	84.4%	174		53.5	53.5				79.6	67.7	73.3	73.5				68.5	53.2	64.0	61.9	$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%)	67.9	718^th of 2761 public middle schools	74.0%		64.7	793^rd of 2783 public middle schools	71.5%	75	72.7	73.7	73.3	55.6	77.3	58.3	62.1	45.5	80.0	63.4	44.4	54.6	9.1	28.6	27.3	60.0	38.8	$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%)	31	1799^th of 2761 public middle schools	34.8%		18.8	2306^th of 2783 public middle schools	17.1%	507	38.1	19.1	28.6	40.0	35.0	42.9	50.0	48.3	40.0	43.0	45.0	30.0	47.6	11.1	6.9	14.3	24.8	$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%)	9.7	2623^rd of 2761 public middle schools	5.0%		12.1	2585^th of 2783 public middle schools	7.1%	38		8.5	8.5					14.4	13.7	14.0					13.3	5.8	9.1	$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%)	11.7	2561^st of 2761 public middle schools	7.2%		13.8	2525^th of 2783 public middle schools	9.3%	36		9.7	9.7				24.3	17.7	20.0	20.8				8.8	13.0	5.9	9.3	$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%)	44.2	1355^th of 2761 public middle schools	50.9%		47.2	1240^th of 2783 public middle schools	55.4%	115		23.5	23.5					41.2	37.3	39.2					33.7	38.2	35.9
Santa Rosa Middle	Public	7-8	500 E St.	Santa Rosa	95404	Sonoma County	Santa Rosa High	No	(n/a)	No	(n/a)	(707) 890-3865	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%)	19.2	2262^nd of 2761 public middle schools	18.1%		19.7	2270^th of 2783 public middle schools	18.4%	8		15.3	15.3					22.4	27.0	24.8					18.1	17.1	17.6	$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%)	47.4	1252^nd of 2761 public middle schools	54.7%		45.2	1307^th of 2783 public middle schools	53.0%	55		27.4	27.4				44.9	46.0	41.8	44.2				35.7	34.2	29.9	33.1	$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 413^th of 2761 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 »

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 2026

2024–25 CSA Spanish test scoresDec 22, 2025

2024–25 dropout rates & graduation ratesNov 14, 2025

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.