John Muir Middle, Corcoran CA - Test Scores & Data

Original Research by School Decision on John Muir Middle

John Muir Middle is a regular public middle school serving grades six through eight in Corcoran, a small San Joaquin Valley agricultural city anchored by state prisons, farming, and light industry. The school enrolls students in roughly equal cohorts across its three grades.

The school serves a student body that is overwhelmingly Hispanic and economically disadvantaged. A substantial majority of students qualify for free or reduced-price lunch, and the enrollment is predominantly from the immediate community. Specific data on English learner status and special education enrollment were not available.

Academic performance is low across the board. State test results from the 2024-25 school year show proficiency rates in English language arts ranging from the low twenties to mid-thirties across the three grades, while math proficiency is much lower, ranging from the mid-teens down to around one in ten by eighth grade. Science proficiency on the state assessment was in the single digits. When viewed alongside the county's district comparison set, the school's overall proficiency index sits below the median for Kings County districts. Trend data covering only one school year does not permit assessment of whether these results reflect longer-term patterns or recent change.

No data on graduation rate, chronic absenteeism, attendance, school discipline, or staffing patterns were available for this middle school, which would typically not report a graduation rate given that it serves only grades six through eight.

Corcoran itself is a blue-collar small town surrounded by agricultural fields, with a walkable downtown anchored by mom-and-pop shops and restaurants along Whitley and Dairy Avenues. Civic institutions including City Hall, the police department, and the public library sit within short walking distance of one another in the downtown core. J. G. Boswell Community Park offers the largest green space, featuring walking trails, an aquatic center with an Olympic-size pool, and sports facilities. The Amtrak San Joaquins line and local bus transit connect the city to regional destinations. Housing in the area is modest in value, with most residential stock consisting of single-family homes, townhouses, and manufactured housing built from the 1970s through the 1990s. The town's population has remained roughly flat to slightly declining in recent years, though developers continue to build new subdivisions.

A parent considering this school should focus on understanding how the school addresses the substantial proficiency gaps evident in state testing data, what interventions or support systems are in place for students, and what the school's plans are for improvement. The low math proficiency in particular, declining sharply through eighth grade, warrants direct conversation with school leadership about curriculum, instruction, and any specialized support available.

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Academic performance

How students perform on state tests, by grade, set against the district.

Math

Grade 617%

School 17% · District 17%

▼ 13 pts below state median · ▼ 15 pts below county median

Grade 719%

School 19% · District 18%

▼ 11 pts below state median · ▼ 12 pts below county median

Grade 812%

School 12% · District 12%

▼ 16 pts below state median · ▼ 8 pts below county median

English language arts

Grade 625%

School 25% · District 25%

▼ 19 pts below state median · ▼ 26 pts below county median

Grade 734%

School 34% · District 34% · ▲ 1 pts above district

▼ 11 pts below state median · ▼ 15 pts below county median

Grade 824%

School 24% · District 24%

▼ 20 pts below state median · ▼ 21 pts below county median

Science

Grade 87%

School 7% · District 7%

▼ 18 pts below state median · ▼ 11 pts below county median

Social studies

Grade 829%

School 29% · District 29%

▼ 20 pts below state median · ▼ 14 pts below county median

This schoolCorcoran Joint Unified, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.

Proficiency by household income

English language arts

Grade 6Lower-income24%Higher-income33%9 pp gap

Grade 7Lower-income33%Higher-income44%10 pp gap

Grade 8Lower-income22%Higher-income48%26 pp gap

Mathematics

Grade 6Lower-income18%Higher-income17%1 pp gap

Grade 7Lower-income17%Higher-income35%18 pp gap

Grade 8Lower-income12%Higher-income8%5 pp gap