Summary:
Zip code 94548 has two K–8 schools in the same Knightsen Elementary district: Old River Elementary enrolls 332 students and Knightsen Elementary enrolls 316, for 648 students altogether. In 2025–2026, the schools’ all-grade proficiency results ranged from 27% to 58% across English language arts (ELA), math, and science. The clearest area-wide finding is that Old River scored above the state in all three subjects, while Knightsen scored below it in all three.
Old River stands out overall: its results were 58% in ELA, 47% in math, and 40% in science, compared with 43%, 27%, and 31% at Knightsen. The schools’ gaps were 15 percentage points in ELA, 21 in math, and 9 in science; SchoolDigger rates Old River 3 stars and ranks it in the 68th percentile, versus 2 stars and the 36th percentile for Knightsen. Grade-level results add important detail: Old River exceeded state ELA results in every supplied grade, but its fifth-grade math proficiency was 21%, compared with 37% statewide. Knightsen exceeded the state in third- and eighth-grade ELA, and its eighth-grade math result of 35% was close to the state’s 36%.
Recent trends are mixed: from 2024–2025 to 2025–2026, Old River’s ELA rose 2 points and science 6, while math fell 4; Knightsen’s ELA fell 1 point, math 6, and science 8. The equal-school area average remained about 1 point above the state in ELA, but math shifted from 4 points above to 1 below, while science moved from 4 points above to about level. Both schools have similar student–teacher ratios—22.5 at Old River and 23.0 at Knightsen in 2024–2025. That year, 15% of Old River students and 38% of Knightsen students were free/reduced lunch eligible. Chronic absenteeism in 2025–2026 was lower than the state’s 18% at both schools: 12% at Old River and 14% at Knightsen. These are useful comparisons, not explanations for differences in test results.
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