Summary
Mountain View Elementary in Ontario, California, serves 564 students in grades K–6 and sits among a varied group of nearby elementary schools. Its results have improved, and it has a standout grade-level strength in third-grade math, but overall proficiency is still below both state and district levels in every tested subject.
Compared with nearby schools, Mountain View is furthest behind the local average in math: its 2025–26 proficiency rates were 41% in ELA, 33% in math, and 31% in science, versus nearby-school averages of 49%, 45%, and 37%. Math was 12 percentage points below the nearby average; ELA was 9 points below and science 6. It also trailed the state by 9 points in ELA, 5 in math, and 5 in science, and its district by 14, 12, and 13 points, respectively. Third-grade math is a bright spot: Mountain View’s 45% was the third-highest among the 11 schools in the comparison, behind Park View Elementary and Liberty Elementary. Fifth-grade math is its clearest grade-level weakness, at 24%—17 points below the district.
Scores have risen since 2022–23: ELA improved by 7 percentage points, math by 7, and science by 10. The gaps with the state narrowed, though Mountain View fell further behind its district in math and science. SchoolDigger ranks the school at the 44th percentile statewide, with 2 stars; its 23.0 student–teacher ratio in 2024–25 is higher than all but one nearby school. The school reported 67% free/reduced lunch eligible in 2024–25. One subgroup result stands out: SchoolDigger’s measure of how well the school serves English Language Learner Students was at the 79th percentile in 2022–23, compared with the school’s overall 36th percentile, but fell to the 51st percentile in 2023–24. Chronic absenteeism also dropped substantially, from 38% in 2021–22 to 7% in 2025–26, even as academic gaps remain.
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