Summary:
Nadaburg Unified School District has four schools enrolling 1,641 students: two schools serving PK–8, one high school serving grades 9–12, and an online academy serving grades 7–12. Proficiency results are available for the three in-person schools, but not for the eight-student online academy. Across the schools with scores, math is the clearest shared concern: their average result is 24%, 9 percentage points below the state, compared with a 37% ELA average, 4 points below the state.
Mountainside High School has the strongest all-grades results, with 44% proficient in ELA and 31% in math; that puts it 3 points above the state in ELA and 2 points below in math. Desert Oasis Elementary School is also ahead of Nadaburg Elementary School overall: 41% versus 25% in ELA, and 25% versus 17% in math. Their ELA gaps are especially large in grade 4 (56% versus 29%) and grade 8 (47% versus 22%). Nadaburg has the lowest all-grades results, with both subjects 16 points below the state.
SchoolDigger’s statewide percentile histories improved on average for the three ranked schools, rising from 31 to 39 between 2023–24 and 2025–26, but the gains were led by Mountainside, which climbed from 33 to 54; Desert Oasis rose from 36 to 41, while Nadaburg fell from 25 to 22. The elementary-school comparison also shows that a lower student-teacher ratio does not coincide with stronger results here: Nadaburg’s ratio is 8.3 students per teacher, compared with 10.3 at Desert Oasis, yet Desert’s all-grades scores are higher in both subjects. Mountainside’s graduation rate is 84.7%, 5 points above the state rate and just 0.1 point below the district rate of 84.8%.
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