Summary:
ZIP code 92113 has one middle school, Knox Middle, serving grades 6–8 and enrolling 488 students. With no other middle school listed, families have no local school-to-school comparison in these data. In 2025–2026, Knox’s proficiency rates were below California’s in English language arts (ELA), mathematics and science. The most important finding is that the gaps were substantial in all three subjects: about 21 percentage points in ELA, 24 in math and 21 in science.
Knox Middle is both the highest- and lowest-scoring school in the ZIP code because it is the only one listed. Its 2025–2026 rates were 29% in ELA, 15% in math and 15% in science, compared with California rates of 49%, 38% and 36%. Knox was also below San Diego Unified by 25 points in ELA, 31 in math and 26 in science. ELA was strongest relative to the state rate, while math had the widest gap; science’s gap was just slightly narrower than ELA’s. By grade, seventh-grade ELA was highest at 34%, while sixth grade had the largest ELA and math gaps with the state—26 and 25 points.
Results changed unevenly from 2024–2025 to 2025–2026: Knox’s ELA score fell 3 points and its state gap widened 3 points; math rose 2 points and narrowed its gap by 1 point. Science rose 3 points, but the state gained slightly more, leaving the gap nearly unchanged and a little wider. SchoolDigger ranked Knox in the 15th percentile, 2,304 of 2,703 schools, with one star in 2025–2026; it was in the 17th percentile in each of the two prior years. Context measures include a student-teacher ratio of 20.6:1 and 96% free/reduced lunch eligible in sy 2024–2025. Chronic absenteeism was 16% in 2025–2026, below the district’s 17% and the state’s 18%. These figures offer context, but one school cannot show whether such measures align with achievement across local schools.
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