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SCHOOL COMMUNITY·CALAVERAS COUNTY OFFICE OF EDUCATION·NCES 069100308686

Mountain Oaks

150 Old Oak Rd., San Andreas, CA 95249 · (888) 686-6257 · Calaveras County
GRADES KG–12COMBINED42-RURALCHARTERTITLE IREGULAR SCHOOL425 STUDENTS
Enrollment
425
Combined
DISTRICT 219 · STATE 602
Student : Teacher
50.4:1
8 FTE teachers
DISTRICT 31.7:1 · STATE 18.6:1
Free / Reduced Lunch
52%
223 students
DISTRICT 58% · STATE 65%
Community
2
0 members
Enrollment and student:teacher ratio compared against other combined schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Kindergarten
39
Grade 1
24
Grade 2
28
Grade 3
27
Grade 4
36
Grade 5
23
Grade 6
41
Grade 7
25
Grade 8
33
Grade 9
25
Grade 10
41
Grade 11
44
Grade 12
39
Student demographics
White
29770%
DISTRICT 70% · STATE 20%
Hispanic
8520%
DISTRICT 20% · STATE 56%
Black
10%
DISTRICT 1% · STATE 5%
Asian
31%
DISTRICT 1% · STATE 12%
Two+
307%
DISTRICT 7% · STATE 6%
Native American
92%
DISTRICT 2% · STATE 0%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
20147%
Female
22453%

Discussions

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Test scores

CAASPP 2023-24 . % met or exceeded standard
English Language Arts
34.1%
CA avg 47.1% . +0.1pp since 2014
Math
18.8%
CA avg 35.6% . +3.8pp since 2014
Source: CAASPP. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
UNDERPERFORMING
Bottom 10% of CA schools after controlling for student poverty
Actual proficiency
25.9%
composite math + reading, all grades
Predicted
48.2%
based on CA schools with similar FRL share
Beats by
-22.4pp
below demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
425
-33 (-7%) vs 2017
Student : Teacher
50.4:1
was 23.0:1
% White
70%
was 71%
% Hispanic
20%
was 17%
% Black
0%
was 1%
% Asian
1%
was 0%
Source: NCES Common Core of Data

About Mountain Oaks

Mountain Oaks operates as a cozy K-12 campus in San Andreas, California, one of the schools within Calaveras County Office of Education. Current enrollment sits at 425 students spanning grades K through 12. Compared to the state average of about 602 students per school, that is 29% below typical.

Across the 4 schools in Calaveras County Office of Education (463 students total), Mountain Oaks accounts for its share of the district's footprint.

In terms of who attends, Mountain Oaks records that the largest single group is White, at 70% of enrollment. Other groups include 20% Hispanic, 7% multiracial, 2% Native American. The wider county runs roughly 79% White, putting the school's mix visibly less White than the area baseline.

On the income-and-resources front, Mountain Oaks logs 8 full-time-equivalent teachers, putting the student-to-teacher ratio at about 50.4:1. Statewide, the average ratio sits near 18.6:1, putting Mountain Oaks higher than the state norm the norm. Roughly 52% of students at Mountain Oaks qualify for free or reduced-price lunch, often used as a Title I proxy.

After controlling for student poverty, Mountain Oaks is in the bottom 10% of California public schools. The BeatsExpectations model predicts schools with this FRL share to land around 48.2%; Mountain Oaks posts 25.9%, -22.4 points below that line.

In the broader community, the surrounding county (Calaveras County) shows that the typical household earns roughly $78,647 per year, roughly 24% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 9%. In all, Calaveras County runs 23 public schools (combined enrollment of about 5,261 students), of which Mountain Oaks is one.

The closest other public school is Calaveras River Academy, roughly 0.0 miles away. Counting just inside five miles, 7 other public schools cluster around Mountain Oaks. Among the 5 schools in that immediate cluster with test data (this one included), Mountain Oaks ranks 2nd on composite proficiency, ahead of the local average of 23.0%.

The school occupies a small-town site. Mountain Oaks is a charter school, which puts it inside the public-school system but outside the standard district-managed model.

Looking at the recent track record. Over the past 7-year window, the student count edged down 7%: 458 students in 2018 compared to 425 in 2025. Class-load math has rose: from 23.0:1 in 2018 to 50.4:1 in 2025.

Inside the community feed, posts here usually surface around open house dates, ride-share offers, and field-trip permission slips. Posting is open to anyone connected to the school.

Calaveras County at a glance

View full county profile
Population
46,248
Census ACS
Median income
$78,647
Household, ACS
Bachelor's+
24%
Adults 25+
Poverty rate
9%
Below federal line
Schools in county
23
5,261 students

Quick facts

School name
Mountain Oaks
District
Calaveras County Office of Education
Address
150 Old Oak Rd., San Andreas, CA 95249
Phone
(888) 686-6257
County
Calaveras County
Level
Combined
Grade range
KG–12
Total enrollment
425
Teachers (FTE)
8
Student–teacher ratio
50.4:1
Free/Reduced lunch
223 (52%)
Locale
42-Rural: Distant
NCES ID
069100308686
Charter school
Yes
Virtual school
No

Related schools

Other schools in Calaveras County Office of Education
Other schools in San Andreas
Nearby schools

Frequently asked questions

About Mountain Oaks
What is the total enrollment at Mountain Oaks?
Mountain Oaks enrolls approximately 425 students in grades KG-12.
Is Mountain Oaks an elementary, middle, or high school?
Mountain Oaks is a combined-grade school covering grades KG-12.
How many teachers does Mountain Oaks have?
Mountain Oaks employs 8 FTE teachers, for a student-to-teacher ratio of 50.4:1.
What is the student diversity at Mountain Oaks?
Student demographics at Mountain Oaks are roughly 70% White, 20% Hispanic, 0% Black, 1% Asian, 7% Two or more.
What district is Mountain Oaks in?
Mountain Oaks is part of Calaveras County Office of Education.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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