Old Mill Elementary: High scores, real growth, strong attendance. We looked for a catch — we didn't find one.

Old Mill Elementary has a Scope Score of 79 out of 100, placing it in the 97th percentile of California elementary schools and ranked #176 statewide. 53.6% of students exceeded the state standard on the 2025 CAASPP assessment, which is 32.3 percentage points above 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, 85.5% of students at Old Mill Elementary met or exceeded the state standard in ELA and Math combined, and 53.6% exceeded it. The gap between those numbers matters: 31.8% of students are at the proficiency floor, while 53.6% 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. 250 student-subject combinations were assessed.

Old Mill Elementary ranks #176 among California elementary schools by Scope Score, placing it in the 97th 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 Old Mill Elementary 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.

7.7% of students at Old Mill Elementary are chronically absent (missing 10% or more of school days), which is better than the California average of 17.9%. The suspension rate is 2.9%. SchoolScope includes these culture metrics in the Scope Score because they reflect day-to-day school experience in ways test scores alone cannot.

Old Mill Elementary scores 79/100 (97th 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 261 students. Use the schools in Mill Valley page or the map view to compare all elementary schools nearby.

At Old Mill Elementary in Mill Valley, 90.3% of white students met or exceeded the ELA standard in 2025, compared to 86.2% district-wide and 61.8% statewide. Old Mill Elementary outperforms its district average for white students by 4.2 percentage points in ELA. Other subgroups: White students (83.7% Math proficient). Data source: California Department of Education, CAASPP 2024-25. 93 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.