Summary:
ZIP code 91963 has one listed school, Potrero Elementary, serving grades K–6 with 300 students. In 2025–2026, its all-grade proficiency was 11% in English language arts (ELA), 11% in math and 13% in science, compared with state results of 49%, 38% and 36%, respectively. The most important finding for families is that proficiency was substantially below the state in all three subjects, with the largest gap in ELA.
Because Potrero Elementary is the only school in the list, it is technically both the highest- and lowest-scoring school locally, but that is not a meaningful comparison between schools. Within its results, science is the relative bright spot: 13% proficient, compared with 11% in ELA and 11% in math; its gap to the state was 23 percentage points, versus 28 in math and 38 in ELA. Grade results show a particular low point in grade 6 math, where 0% were proficient compared with 37% statewide. Grade 4 math was closer to the state, at 18% versus 42%, but still 25 points behind.
Recent results were mixed: from 2024–2025 to 2025–2026, math rose 5 percentage points and science rose 5, while ELA fell 3; the gap to the state narrowed in math by 4 points and science by 1, but widened in ELA by 3. SchoolDigger placed Potrero Elementary at the 2nd percentile in 2023–2024, 1st in 2024–2025 and 2nd in 2025–2026, awarding 0 stars each year. Other context includes chronic absenteeism of 34%, compared with 18% statewide, a 25:1 student–teacher ratio in 2024–2025, and 79% free/reduced lunch eligible in 2024–2025. With only one listed school, the data cannot support local school-to-school comparisons.
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