Summary:
ZIP code 99005 has one middle school, Mountainside Middle School, serving grades 6–8. The school enrolls 824 students and is part of the relatively strong Mead School District, which ranks in the 79th percentile statewide. Because it is the only middle school in the ZIP code, families cannot compare it with another nearby school using these data.
Mountainside Middle School has a mixed academic profile. English language arts is its strongest area: 55.47% of students were proficient in 2025–2026, above the Washington rate of 52.81%, although below the district rate of 60.47%. ELA results were consistent across grades, ranging from 55.14% to 55.90%. Math was weaker, with 40.37% proficiency compared with 49.65% in the district and 43.11% statewide. Math performance also declined by grade, from 42.25% in sixth grade to 38.79% in eighth grade. Science was another concern, with 42.99% proficiency, below both the district’s 52.65% and the state’s 50.95%.
The most important trend is that achievement declined in every reported subject from the previous year. ELA fell 2.10 percentage points, math dropped 4.45 points, and science decreased 7.01 points. The school’s ranking also slipped from the 69th percentile to the 64th percentile, while its rating remained three stars. For families, the strongest indicator is stable ELA performance, while the clearest priorities are math—especially in the upper grades—and science. The school reports a 18.6-to-1 student–teacher ratio, 44.9% free- or reduced-price lunch participation, and $15,182 in per-student spending. These figures provide useful context, but they do not by themselves indicate classroom size or explain the recent academic decline.
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