Summary:
ZIP code 94525 has three schools in John Swett High and Willow High (grades 9–12) and Carquinez Middle (grades 6–8). In 2025–26, the two schools with reportable scores averaged 43% proficient in English language arts (ELA), 15% in math, and 26% in science, compared with statewide results of 49%, 38%, and 36%. The clearest area-wide concern is math: the average was 24 percentage points below the state.
John Swett led the two reporting schools in all-grades scores: 50% in ELA, 17% in math, and 28% in science, versus Carquinez at 36%, 12%, and 24%. John Swett was near the state ELA result, about 1 point higher, but 22 points below in math and 8 below in science. Carquinez was below the state in every subject, with the largest gap in math at 26 points. SchoolDigger ranked John Swett 1,209 of 2,137 (43rd percentile, 2 stars) and Carquinez 2,011 of 2,703 (26th percentile, 1 star).
Math proficiency fell at both reporting schools from 2024–25 to 2025–26, while science rose at both; ELA slipped at John Swett and improved at Carquinez. Over those years, the average math gap to the state widened by 6 points, while the science gap narrowed by 1 point. Context differs, too: 2024–25 student-teacher ratios were 18.5 at John Swett, 20.5 at Carquinez, and 22.8 at Willow; free/reduced lunch eligible rates that year were 74%, 84%, and 69%, respectively. Willow had 26 students and 68% chronic absenteeism in 2025–26, but has no reportable test scores for that year, so its academic performance cannot be compared here. All-grades scores also cover different grade spans.
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