Twin Hills Charter Middle School

1685 Watertrough Rd.
Sebastopol, CA 95472
9/
10
Top 20%
Serving 207 students in grades 6-8, Twin Hills Charter Middle School ranks in the top 20% of all schools in California for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 50% (which is higher than the California state average of 33%). The percentage of students achieving proficiency in reading/language arts is 70% (which is higher than the California state average of 47%).
The student:teacher ratio of 15:1 is lower than the California state level of 21:1.
Minority enrollment is 36% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).

Quick Stats (2025)

  • School Type: Charter School
  • Grades: 6-8
  • Enrollment: 207 students
  • Student:Teacher Ratio: 15:1
  • Minority Enrollment: 36%
  • : Top 20% in CA
  • : 50% (Top 20%)
  • : 70% (Top 20%)
  • : 40-44% (Top 30%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

Top Rankings

Twin Hills Charter Middle School ranks among the top 20% of public schools in California for:

School Overview

Twin Hills Charter Middle School's student population of 207 students has declined by 26% over five school years.
The teacher population of 14 teachers has declined by 6% over five school years.
School Type
Grades Offered
Grades 6-8
Total Students
207 students
This chart displays total students of Twin Hills Charter Middle School by year, with the latest 2022-23 school year data.
Gender %
This chart displays gender of Twin Hills Charter Middle School
Total Classroom Teachers
14 teachers
This chart displays the total teachers of Twin Hills Charter Middle School by year, with the latest 2022-23 school year data.
Students by Grade
This chart displays the students of Twin Hills Charter Middle School by grade.

School Rankings

Twin Hills Charter Middle School ranks within the top 20% of all 9,602 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Twin Hills Charter Middle School is 0.53, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
This School
State Level (CA)
#1502 out of 9602 schools
(Top 20%)
This chart displays the overall school rank of Twin Hills Charter Middle School, with the latest 2021-22 school year data.
50%
33%
This chart displays the percentage of students that scored at or above 'proficient' levels in Math of Twin Hills Charter Middle School and the percentage of public school students that scored at or above 'proficient' levels in Math of public schools in California by year, with the latest 2021-22 school year data.
70%
47%
This chart displays the percentage of students that scored at or above 'proficient' levels in Reading/Language Arts of Twin Hills Charter Middle School and the percentage of public school students that scored at or above 'proficient' levels in Reading/Language Arts of California by year, with the latest 2021-22 school year data.
40-44%
29%
Student : Teacher Ratio
15:1
21:1
This chart displays the student teacher ratio of Twin Hills Charter Middle School and the public school average student teacher ratio of California by year, with the latest 2022-23 school year data.
American Indian
n/a
1%
This chart displays the percentage of American Indian students in Twin Hills Charter Middle School and percentage of American Indian public school students in California by year, with the latest 2022-23 school year data.
Asian
1%
12%
This chart displays the percentage of Asian students in Twin Hills Charter Middle School and the percentage of Asian public school students in California by year, with the latest 2022-23 school year data.
Hispanic
24%
56%
This chart displays the percentage of Hispanic students in Twin Hills Charter Middle School and the percentage of Hispanic public school students in California by year, with the latest 2022-23 school year data.
Black
n/a
5%
This chart displays the percentage of Black students in Twin Hills Charter Middle School and the percentage of Black public school students in California by year, with the latest 2019-20 school year data.
White
64%
20%
This chart displays the percentage of White students in Twin Hills Charter Middle School and the percentage of White public school students in California by year, with the latest 2022-23 school year data.
Hawaiian
n/a
n/a
Two or more races
11%
6%
This chart displays the percentage of students of two or more races in Twin Hills Charter Middle School and the percentage of public school students of two or more races in California by year, with the latest 2022-23 school year data.
All Ethnic Groups
This chart displays the percentage breakdown of students of all ethnic groups in Twin Hills Charter Middle School.
This chart displays the percentage breakdown of public school students of all ethnic groups in California.
0.53
This chart displays the diversity score of Twin Hills Charter Middle School and the public school average diversity score of California by year, with the latest 2022-23 school year data.
Eligible for Free Lunch
26%
54%
This chart displays the percentage of students who is eligible for free lunch in Twin Hills Charter Middle School and the percentage of public school students who is eligible for free lunch in California by year, with the latest 2022-23 school year data.
Eligible for Reduced Lunch
2%
8%
This chart displays the percentage of students who is eligible for reduced lunch in Twin Hills Charter Middle School and the percentage of public school students who is eligible for reduced lunch in California by year, with the latest 2022-23 school year data.
Source: National Center for Education Statistics (NCES), CA Dept. of Education

Frequently Asked Questions

What is Twin Hills Charter Middle School's ranking?
Twin Hills Charter Middle School is ranked #1502 out of 9,602 schools, which ranks it among the top 20% of public schools in California.
What schools are Twin Hills Charter Middle School often compared to?
Twin Hills Charter Middle Schoolis often viewed alongside schools like Hillcrest Middle School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
50% of students have achieved math proficiency (compared to the 33% CA state average), while 70% of students have achieved reading proficiency (compared to the 47% CA state average).
How many students attend Twin Hills Charter Middle School?
207 students attend Twin Hills Charter Middle School.
What is the racial composition of the student body?
64% of Twin Hills Charter Middle School students are White, 24% of students are Hispanic, 11% of students are Two or more races, and 1% of students are Asian.
What is the student:teacher ratio of Twin Hills Charter Middle School?
Twin Hills Charter Middle School has a student ration of 15:1, which is lower than the California state average of 21:1.
What grades does Twin Hills Charter Middle School offer ?
Twin Hills Charter Middle School offers enrollment in grades 6-8
What school district is Twin Hills Charter Middle School part of?
Twin Hills Charter Middle School is part of Twin Hills Union Elementary School District.

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Quick Stats (2025)

  • School Type: Charter School
  • Grades: 6-8
  • Enrollment: 207 students
  • Student:Teacher Ratio: 15:1
  • Minority Enrollment: 36%
  • : Top 20%
  • : 50% (Top 20%)
  • : 70% (Top 20%)
  • : 40-44% (Top 30%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

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