Summary:
Mountain School Inc. has one elementary school, Mountain School, serving grades K–6 with 184 students and a reported student–teacher ratio of 10.2:1. The available results put the school above Arizona in both all-grade subjects: 61% of students are proficient in ELA, compared with 41% statewide, and 61% in math, compared with 33%. The clearest overall takeaway is that the school’s advantage over the state is especially large in math, at 28 percentage points.
Mountain School is both the highest- and lowest-ranked school in this area by default, because it is the only school listed; there are no local peers to compare. Its strongest listed grade-level results are in grade 5: 76% in math, 38 points above Arizona, and 67% in ELA, 29 points above. Results are less uniformly strong across grades: grade 3 math is 42%, just 4 points above the state’s 38%, while the school’s grade-level results span 34 points in math and 14 points in ELA. Its separate grade 5 science result is also above the state figure: 61% versus 34% in 2024–25, a 27-point advantage.
SchoolDigger’s relative ranking declined and then held steady, while the supplied test results do not show whether proficiency changed over time. It ranked at the 90th percentile in 2023–24 (95 of 912 schools), then at the 82nd percentile in both 2024–25 (160 of 909) and 2025–26 (163 of 900); SchoolDigger gave it 4 stars in all three years. The 8-point percentile decline is a change in rank, not evidence of falling test scores. The student–teacher ratio is 10.2:1, and no free/reduced-lunch rate is reported. Because this list has one school and no earlier test scores, it cannot support peer comparisons or a year-to-year proficiency trend.
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