Summary:
ZIP code 98144 has one middle school in this data set: Washington Middle School, serving grades 6–8 in Seattle’s south-central area. The school enrolls 566 students and is part of Seattle School District No. 1, so there are no other local middle schools in this data set for a direct school-to-school comparison.
Washington Middle School is performing slightly above Washington’s statewide averages overall. In 2025–26, proficiency was 53.0% in English language arts, 45.3% in math, and 56.0% in science, compared with statewide rates of 52.8%, 43.1%, and 51.0%. Science is the school’s strongest subject relative to the state, and it improved sharply from 42.5% the previous year. English and math also improved, though more modestly. The school’s statewide ranking rose from the 56th percentile in 2023–24 to the 69th percentile in 2025–26, indicating a positive recent trend.
Results vary considerably by grade. Eighth graders had the strongest outcomes, with 59.4% proficient in ELA and 48.9% in math—well above state averages. Sixth grade is the clearest area for additional support: ELA proficiency was 43.7%, below the state rate, while math proficiency was 40.4%, only slightly above the state. The school trails the district averages in all three subjects, but the gap narrows by eighth grade, suggesting students may make meaningful progress during middle school. Families may also want to consider the school’s 17.9-to-1 student–teacher ratio, 57.24% free-or-reduced-price-lunch rate, and reported spending of $21,716 per student as useful context when evaluating the school.
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