Summary
In San Mateo, Parkside Montessori serves 418 students in kindergarten through grade 8. Its 2025–26 proficiency rates were above district and state averages in English language arts (ELA), math, and science, but the schoolwide results vary sharply by grade. ELA proficiency was 49% in grade 3 and 50% in grade 4, compared with 80%–97% in grades 5–8; math was lowest in grades 4–5, at 49% and 43%. The most important takeaway is that Parkside’s strong overall results do not describe every grade equally: early-grade ELA and grades 4–5 math are the clearest soft spots.
Compared with nearby schools, Parkside is above average in all three subjects, though it is not the local leader in ELA or math. It exceeded the average for 10 nearby schools by 22 percentage points in ELA, 14 in math, and 17 in science, placing fifth of 11 schools in ELA and math and fourth in science. Among nearby K–8 schools, North Shoreview Montessori had higher all-grade ELA and math results than Parkside, while Parkside’s science result was higher. Parkside also exceeded Bayside Academy in all three subjects. Against the San Mateo-Foster City district, Parkside’s leads were 18 points in ELA, 13 in math, and 13 in science; its leads over California were 21, 26, and 22 points, respectively.
Scores have risen overall since 2022–23, though not steadily: ELA increased by 2 percentage points, math by 5, and science by 8, with science declining after a 2023–24 peak. SchoolDigger rated Parkside at the 78th statewide percentile with 4 stars in 2025–26; four nearby schools ranked higher. Parkside’s 2024–25 free/reduced lunch eligible rate was 18%, compared with a nearby-school average of 42%, and its student-teacher ratio was 21.2, close to the nearby average. SchoolDigger’s statewide group rankings were lower than its overall standing for Asian students (61st percentile) and White students (60th), compared with 78th overall, indicating a less strong relative standing in serving those groups than the school’s overall ranking suggests.
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