Stone Bridge: No single number tells this school's story. Here's the honest picture.

Stone Bridge has a Scope Score of 41 out of 100, placing it in the 47th percentile of California elementary schools and ranked #3,071 statewide. 11.7% of students exceeded the state standard on the 2025 CAASPP assessment, which is 9.6 percentage points below the California average of 21.3%. The Scope Score weights six dimensions for elementary schools: exceeded standard (43%), met or exceeded (22%), grade 3-to-5 growth (15%), chronic absenteeism (10%), ELPAC English Learner proficiency (5%), and suspension rate (5%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.

On the 2025 CAASPP Smarter Balanced Assessment, 30.6% of students at Stone Bridge met or exceeded the state standard in ELA and Math combined, and 11.7% exceeded it. The gap between those numbers matters: 18.9% of students are at the proficiency floor, while 11.7% pushed past it. Most rating sites report only the combined "proficient" number. SchoolScope surfaces the exceeded-vs-met split because it reveals whether a school's curriculum challenges students beyond minimum proficiency or paces toward it. 180 student-subject combinations were assessed.

Stone Bridge ranks #3,071 among California elementary schools by Scope Score, placing it in the 47th percentile. This ranking is based on a weighted composite of 2025 CAASPP test performance (exceeded and met rates), grade-level growth (Grade 3 to grade 5 growth), chronic absenteeism, and suspension rate. Unlike single-number ratings, the Scope Score shows what drives the ranking so parents can decide what matters most to their family. See full methodology.

Based on 2025 CAASPP data, proficiency at Stone Bridge increases by 5.0 percentage points from Grade 3 to grade 5 growth. This upward trajectory suggests the school is adding measurable value — students leave with higher proficiency rates than they entered with. Growth trajectory is weighted at 15% in the elementary Scope Score because it measures what the school does, not just who walks in the door.

13.7% of students at Stone Bridge are chronically absent (missing 10% or more of school days), which is better than the California average of 17.9%. The suspension rate is 0.2%, indicating a low-discipline-incident environment. SchoolScope includes these culture metrics in the Scope Score because they reflect day-to-day school experience in ways test scores alone cannot.

Stone Bridge scores 41/100 (47th percentile) among California elementary schools. To compare with nearby schools, SchoolScope shows the same metrics side by side: exceeded rate, proficiency, growth trajectory, and school culture indicators. The school serves 278 students. Use the schools in Napa page or the map view to compare all elementary schools nearby.

At Stone Bridge in Napa, 48.3% of white students met or exceeded the ELA standard in 2025, compared to 62.7% district-wide and 61.8% statewide. Stone Bridge trails its district average for white students by 14.4 percentage points in ELA. Other subgroups: White students (31.9% Math proficient). Data source: California Department of Education, CAASPP 2024-25. 116 students tested. SchoolScope shows disaggregated test scores by demographic subgroup so you can see how a school performs for your child's specific group — not just the school-wide average. Subgroup data is context, not part of the Scope Score: we don't penalize schools for who they serve. See our equity approach.