Summary:
Zip code 98027 in Issaquah, Washington, is served by two public middle schools (grades 6-8) operating within the highly-regarded Issaquah School District, which is ranked among the top districts in the state.
While both schools are strong performers, Cougar Mountain Middle School stands out as the top academic choice, consistently ranking higher than Issaquah Middle School. For the 2024-2025 school year, Cougar Mountain ranked 26th out of 534 Washington middle schools, achieving notably higher proficiency rates in English (80.13% vs. 67.55%) and Math (72.73% vs. 62.48%). It has also shown more consistent improvement in its state ranking over the past three years.
The performance gap exists despite very similar resources, with nearly identical per-student spending and student-teacher ratios at both schools. A key difference is the student population, as Issaquah Middle School serves a higher percentage of students qualifying for free or reduced-price lunch. Both schools significantly exceed state averages in all subjects, though Cougar Mountain more consistently meets or exceeds the high district averages. An interesting note is that science scores are relatively close between the two schools and are an area where both trail the district average, suggesting a common curricular focus.
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