Arma J. Shull Elementary

Arma J. Shull Elementary, a mid-tier elementary campus in San Dimas, California, overseen by Bonita Unified, hosts 633 students, covering grades K through 5. That puts it 36% larger than the typical public school in California, which averages around 465 students.

Across the 15 schools in Bonita Unified (9,905 students total), Arma J. Shull Elementary accounts for its share of the district's footprint.

Demographically, Arma J. Shull Elementary shows that the largest single group is Hispanic at 48%, but no single group is in the majority; the rest reads as 22% Asian, 19% White, 10% multiracial. That mix tracks the wider county fairly closely.

Looking at the economic backdrop, On paper, Arma J. Shull Elementary has 23 full-time-equivalent teachers, translating to a class-load average of around 27.8:1. The state averages around 22.3:1, so this campus is higher than the state norm typical. Around 26% of the student body qualifies for free or reduced-price meals, often used as a Title I proxy. By comparison, Los Angeles County runs at roughly 70%, so the school's eligibility rate is somewhat below the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Arma J. Shull Elementary ranks in the top 10% of California public schools. The BeatsExpectations model, a per-state regression of composite proficiency on FRL share, predicts schools with this student profile to land around 64.0%; Arma J. Shull Elementary posts 79.8%, +15.8 points above that line.

In the area at large, the surrounding county (Los Angeles County) shows that the typical household earns roughly $90,112 per year, 36% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 10%. Across Los Angeles County's 2244 public schools (combined enrollment of about 1,265,907 students), Arma J. Shull Elementary is one campus in the mix.

Nearest neighbor: Sutherland Elementary, around 0.6 miles off. Within five miles, there are 8 other public schools. Among the 6 schools in that immediate cluster with test data (this one included), Arma J. Shull Elementary ranks 1st on composite proficiency, ahead of the local average of 60.0%.

The campus sits in an outer-ring setting.

Five-year trend. Looking back 7 years, enrollment at Arma J. Shull Elementary has held roughly steady, going from 641 students in 2018 to 633 in 2025. The White share of enrollment contracted from 29% to 19% over that span. Class-load math has rose: from 26.7:1 in 2018 to 27.8:1 in 2025.

Inside the community feed, members of the Arma J. Shull Elementary community share and discuss sports schedules, lunch menu changes, and school spirit week. Posting is open to anyone connected to the school.