Summary:
Zip code 93656 has one listed middle-school option: Riverdale Elementary, which serves grades 4–8 and has 507 students. In 2025–2026, its all-grade proficiency was 38% in English language arts (ELA), 28% in math, and 31% in science. The key takeaway is that Riverdale improved in all three subjects but remains below state proficiency in each: by 11 points in ELA, 10 in math, and 5 in science.
Riverdale is both the highest- and lowest-performing school in this one-school list, so that is not evidence it leads or trails other local schools. Compared with the Riverdale Joint Unified district, it was 3 points higher in math and 4 points higher in science, but 1 point lower in ELA. Within the school, sixth grade is the clearest low point: ELA proficiency was 26%, versus 48% statewide for sixth grade, and math was 16%, versus 37% statewide. Eighth-grade ELA stands out in the other direction, at 51%—about 1 point above the state. SchoolDigger rates Riverdale 2 stars and ranks it 1,414th of 2,703 schools, at the 48th percentile.
Results rose from 2024–2025 to 2025–2026, especially in science: Riverdale gained 3 percentage points in ELA, 1 in math, and 15 in science. Its gap with the state narrowed in all three subjects, most notably in science, from 17 points to 5. SchoolDigger’s percentile ranking also edged up from 46th to 48th, after 49th in 2023–2024. Attendance is a relative positive: chronic absenteeism was 11%, compared with 12% districtwide and 18% statewide. For context, the school’s 2024–2025 student–teacher ratio was 17.8, and 91% of students were free/reduced lunch eligible that school year. With only one school listed, there is no peer-school comparison.
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