Summary
Ruth Musser Middle serves 941 students in grades 5–8 in Rancho Cucamonga, within the Central Elementary District. Its results are uneven: in 2025–26, 54% of students were proficient in English language arts (ELA) and 39% in science, both above state results of 49% and 36%; math proficiency was 32%, below the state’s 38%. The clearest concern is math, especially seventh grade, where proficiency was 29%, compared with 38% statewide and 30% in the district.
Compared with nearby schools, Ruth Musser’s matched-grade results are generally toward the lower end, despite its above-state ELA and science results. In grades 6–8, its ELA proficiency was 49%, 51% and 56%; each result was among the two lowest among nearby schools reporting that grade. Math was also below most nearby schools in grades 6 and 8, while seventh-grade math was second-lowest in the group. A bright spot is fifth-grade ELA at 63%, 14 percentage points above the state and 13 above the district. Grade 8 science was 42%, above state and district results but below five of nine nearby schools. Nearby schools generally serve grades 6–8, so fifth-grade and all-grades comparisons are not available on the same basis.
Over time, Ruth Musser has lost ground to the state in ELA and math, while science has improved: from 2022–23 to 2025–26, ELA fell 6 percentage points and math was nearly unchanged, while science rose 4 points. The science gain has not kept pace with the state’s rise, and the SchoolDigger overall ranking declined from the 74th percentile to the 61st; in 2025–26, the school received 3 stars, compared with the district’s 49th-percentile, 2-star standing. SchoolDigger’s group rankings also show different results: the school ranked at the 35th percentile for serving Asian students, 26 points below its overall standing, while its ranking for serving Special Education students rose 18 points to the 72nd percentile in 2025–26. In 2024–25, 69% of students were eligible for free/reduced lunch, and the student–teacher ratio was 22.4.
Thank you for your feedback!