Summary:
Corcoran Joint Unified has one middle school, John Muir Middle, serving grades 6–8 and enrolling 754 students. Its 2025–2026 proficiency results improved in all three subjects, but remained below California’s results in ELA, mathematics, and science.
Science is the school’s strongest subject relative to the state, while ELA has the largest gap. In 2025–2026, 28% of students were proficient in science, 8 percentage points below California; 25% were proficient in math, 14 points below; and 31% were proficient in ELA, 18 points below. Compared with Corcoran Joint Unified, John Muir was 1 point higher in science and 4 points higher in math, but 3 points lower in ELA. Grade 8 math stands out: 34% were proficient, just 3 points below the state result. There is no second school in the list for a school-to-school leader or trailer comparison.
Results rose from 2024–2025 to 2025–2026 in every subject, with the largest improvement in science: proficiency increased by 21 percentage points, compared with 9 points in math and 4 in ELA. John Muir’s gaps with the state narrowed by 18 points in science, 8 in math, and 3 in ELA, though the school still remained below state results in all three subjects. SchoolDigger’s overall ranking also moved up, from the 16th percentile (rank 2,347 of 2,783 schools) in 2023–2024 to the 32nd percentile (rank 1,843 of 2,703) in 2025–2026. For context, 91% of students were free/reduced lunch eligible in 2024–2025, and the student–teacher ratio that year was 19.3. These figures describe the school but do not explain its achievement results.
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