High Schools in Seaside School District 10

Seaside School District 10 has one high school, Seaside High School in Seaside, Oregon, serving grades 9–12 with 489 students, so it alone defines the district’s high-school outcomes. The district is ranked 99 of 141, 30th percentile, 2 stars. Data includes school/district rank history from 2023–24 through 2025–26, graduation and chronic absenteeism for 2024–25, OSAS proficiency for 2025–26, and spending, student-teacher ratio, and free/reduced lunch for 2024–25. For the high school, OSAS “All Grades” and “11th Grade” results match in every subject, suggesting its tested population is effectively the 11th-grade cohort.

Seaside High’s clearest strength is science: 24.2% proficiency, above the district all-grade rate of 20.3%, though still below Oregon’s 11th-grade science rate of 33.8%. Its state rank improved from 222nd of 268 in 2023–24 to 198th of 271 in 2025–26, with percentile rising from 17 to 27, but it remains a 1-star school in the bottom third. Mathematics is a severe weakness: only 14.3% were proficient, far below Oregon’s 11th-grade rate of 22.9% and all-grade rate of 32.9%. ELA was 35.6% versus the state’s 46.0% at 11th grade, and graduation was 79.7% versus Oregon’s 83.0%. Chronic absenteeism is high at 46.3%, compared with 39.6% districtwide and 33.5% statewide.

For parents, the most urgent concerns are math proficiency and chronic absenteeism, while science and the improving rank trend are positive signals from a low base. District all-grade ELA and math results are better than the high school’s—41.6% versus 35.6% in ELA and 26.9% versus 14.3% in math—suggesting younger grades may be performing better or that the high-school cohort faces stronger headwinds. Graduation is below state but not as far below as math, which may reflect credit recovery or other supports. Spending per student is $21,170 with a student-teacher ratio of 17.2; without a state benchmark, it is hard to judge whether this is unusually high, but weak math outcomes alongside high spending raise questions about intervention effectiveness. A reported free/reduced lunch figure of 139.47% is anomalous and should be treated as a data-quality flag, not as a valid percentage.