Arundel Elementary vs Mariposa

Arundel Elementary and Mariposa sit 0.7 miles apart in San Carlos, California, but occupy meaningfully different positions in California's school rankings. Mariposa ranks #47 of 9,533 schools statewide compared to Arundel Elementary's #131 of 9,533 — a gap of 84 positions that places Mariposa in roughly the top 0.5% of all California elementary schools. Their overall ratings are close (9.4/10 for Mariposa versus 9.2/10 for Arundel Elementary), but the state rank delta is the more telling indicator of relative standing.

On academic proficiency, Arundel Elementary holds a narrow edge: 9.8/10 versus Mariposa's 9.7/10. The advantage flips on growth, where Mariposa scores 9.9/10 compared to Arundel Elementary's 9.7/10 — meaning students at Mariposa are outpacing expected academic progress at a higher rate. For families who weight trajectory over baseline achievement, Mariposa's growth score is the stronger signal. Both schools sit at the top of the distribution on both dimensions, so the practical difference is narrow, but it exists.

The two schools are closely matched on demographics and socioeconomic composition. Free and reduced lunch participation is nearly identical — 11% at Arundel Elementary versus 10% at Mariposa — indicating comparable family income profiles. Arundel Elementary enrolls more students (376 versus 286 at Mariposa), and its student-teacher ratio of 22.1:1 is modestly higher than Mariposa's 20.4:1. That 1.7-student-per-teacher difference is real, particularly for families prioritizing classroom attention at younger grades.

The most structurally important distinction is grade configuration: Arundel Elementary serves kindergarten through 3rd grade, while Mariposa serves grades 4 and 5 only. These schools are not direct alternatives for a single child at a given point in time — they are sequential steps in the San Carlos Unified pipeline. A family in the district would typically attend both, with Arundel Elementary first and Mariposa after. Parents should evaluate each school for the specific grade window their child is entering, not as interchangeable choices.