Summary:
Thermalito Union Elementary has one listed middle school, Nelson Avenue Middle, serving grades 6–8 and enrolling 456 students. In 2025–2026, Nelson Avenue’s proficiency was above the district average in ELA, math and science, but below state averages in all three. Its clearest relative strength is science: 33% were proficient, compared with 36% statewide, a 3-point gap.
There is no separate top or bottom school to compare because Nelson Avenue is the only school listed. Among its subjects, science had the smallest state gap: ELA proficiency was 37% versus 49% statewide, a 13-point shortfall; math was 28% versus 38%, an 11-point shortfall; and science was 33% versus 36%, a 3-point shortfall. The school exceeded district results by 2 points in ELA, 1 point in math and 3 points in science. Grade-level results show a stronger 8th-grade math outcome than the all-grades figure suggests: 36.0% were proficient, compared with 36.3% statewide, less than a point apart. In 6th grade, ELA was 30% versus 48% statewide, and math was 19% versus 37%.
Recent changes differ by subject: from 2024–2025 to 2025–2026, Nelson Avenue’s ELA proficiency fell 2 points, while math and science each rose 4 points. Its state gap widened by 3 points in ELA, but narrowed by 3 points in math and 1 point in science. SchoolDigger’s ranking improved from 1,691st of 2,783 schools (39th percentile) in 2023–2024 to 1,590th of 2,703 (41st percentile) in 2025–2026, a gain of 101 places, even as the latest ELA score declined. Other context: the student–teacher ratio was 19.4 in 2024–2025, and 86% of students were reported as free/reduced lunch eligible that year; these figures describe the school, not the cause of its results.
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