Schools · Rio Oso

Rio Oso, CA schools

Rio Oso’s public schools score above California’s averages: 52% of students are proficient in reading against 48.5% statewide, and 97% of high schoolers graduate on time against 87.6%. Kids attend Browns Elementary through grade 8, then East Nicolaus High.

Grades, test scores, graduation, spending and every school, from U.S. Department of Education data.

TownTapestry School GradeNew

Rio Oso’s School Grade: B

The public schools Rio Oso’s kids attend, from kindergarten through graduation, outperform 62% of California’s districts on state tests and graduation. Among towns with similar incomes, they sit near the middle.

B-Test scoresAGraduation
California school districts we grade (1,139)Better than 62%
Lower resultsHigher results
California towns with similar household incomes (519)Better than 52%
Lower confidence. Built on 74 tested students and a graduating class of 78. With numbers this small, one year can move the grade.
How the School Grade works
  • Results, not inputs. Math and reading proficiency on California’s state tests, each against the state average, plus the four-year graduation rate. Spending and class size are shown below but don’t count toward the grade. Tests: 2020–21; graduation: class of 2020.
  • The whole path. A town’s grade follows its kids: every district that serves it, weighted by the number of students tested in each. Tests count 60% and graduation 40%.
  • Graded within the state. Each state writes its own tests, so districts are lined up against the rest of California only. A+ top 5%A next 10%A- next 10%B B+ to B−, next 30%C C+ to C−, next 30%D D and D−, bottom 15%
  • Individual schools are graded the same way on their own test results, against every public school in California with 25+ students. Private schools aren’t graded: they don’t take the state tests.
  • What a grade can’t tell you. Test results track family income closely, so a high grade partly reflects who lives in a town. That’s why we also compare towns with similar incomes. Visit, ask other parents, and read neighbor reviews. It’s our own summary of U.S. Department of Education data, not an official rating.
School path

Where Rio Oso kids go to school

Grades K–8
BBrowns Elementary 143 students · Rio Oso Browns Elementary School District

Based on district boundaries from the U.S. Department of Education. Check with the district before you enroll.

Test scores · 2020–21

Close to the state in reading

Reading (grades 9–12, East Nicolaus Joint Union High)49.5%
State average 48.5% · reported as a range, 40–59% (a small group)
Reading (grades K–8, Browns Elementary)52%
State average 48.5%
Math (grades 9–12, East Nicolaus Joint Union High)30%
State average 33.4% · reported as a range, 21–39% (a small group)
Math (grades K–8, Browns Elementary)22%
State average 33.4%
Graduation · class of 2020

97% graduate on time

Graduation rate
97%
CA: 87.6%
Graduating class
78
students

The share of students who started ninth grade together and earned a regular diploma within four years.

Districts

Two districts serve Rio Oso

Each district’s own page has its spending, test scores, enrollment and every school.

Every school

All 1 school in Rio Oso

Showing 1–1 of 1 school

School data from the U.S. Department of Education (NCES). Ratings are from neighbors on TownTapestry.

Also serving Rio Oso

Schools Rio Oso kids attend in other towns

Public schools in Rio Oso’s district that are located in Nicolaus.

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Rio Oso

California · CA
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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/19 · 2025-01-01