Summary
Samuel W. Simpson Elementary is a K–5 school in Rialto, California, with 638 students in Rialto Unified. Its strongest overall distinction is that, in 2025–2026, it ranked first among the seven nearby K–5 schools in ELA, math, and science proficiency.
Academically, the school stands out most in ELA: 68% of students were proficient, compared with 49% statewide, 44% in the district, and 39% across nearby K–5 schools. Math proficiency was 54%, versus 38% statewide and 25% in the district; science was 48%, compared with 36% statewide and 28% in the district. The main weakness is fifth-grade math: proficiency was 37%, a sharp drop from 61% in fourth grade, and less than 1 percentage point above the state result. It was 1 point below nearby Georgia F. Morris Elementary, the local grade-five leader. This dip is specific to math: Simpson had the highest nearby grade-five ELA and science results.
Results have improved since 2022–2023: proficiency rose 14 points in ELA, 13 in math, and 12 in science, while the school’s lead over the state also grew in each subject. SchoolDigger gives the school a 4-star rating and places it at the 80th statewide percentile, up from the 64th percentile in 2022–2023; the district is at the 35th percentile with 2 stars. Chronic absenteeism also fell, from 47% in 2021–2022 to 8% in 2025–2026, the lowest reported rate among nearby schools. The 2024–2025 student-teacher ratio was 24.5, around the nearby range of 20.7–25.7, and 83% of students were free/reduced lunch eligible, compared with an 86% nearby average. SchoolDigger’s subgroup rankings show lower relative results for students with disabilities: the school ranked at the 16th percentile for that group in 2021–2022, compared with its overall 53rd percentile that year; for Special Education Students, it ranked at the 57th percentile in 2025–2026, below its overall 80th percentile.
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