Summary:
ZIP code 98012 has one listed middle school, Heatherwood Middle School, serving grades 6–8 in Mill Creek. The school enrolls 1,031 students and is part of the Everett School District. Because it is the only middle school in the ZIP code, families cannot compare it with another nearby school within the same ZIP code, but its results can be compared with district and Washington state averages.
Heatherwood reports strong academic performance across all three tested subjects. In 2025–2026, 71.48% of students were proficient in English Language Arts, 65.12% in math, and 69.86% in science. These results were higher than the district averages by about 6 to 8 percentage points and higher than Washington averages by roughly 19 to 22 points. Math was the school’s lowest overall subject result, but it was also the area of greatest advantage over the state. By grade, 7th grade had the strongest ELA performance at 75.15%, while 6th grade led in math at 67.47%. Eighth-grade science proficiency was 69.86%, compared with 48.78% statewide.
The school ranked 37th out of 514 Washington schools in 2025–2026, placing it in the 93rd percentile and earning five stars. It has remained in the top 10% statewide for the three years reported, improving from 51st place the previous year. Compared with 2024–2025, science proficiency increased by 4.70 percentage points and math rose by 1.82 points, while ELA declined modestly by 2.11 points but remained well above district and state levels. Families may also want to consider the school’s 23:1 student-teacher ratio, 31.81% free- or reduced-price lunch rate, and relatively large enrollment when evaluating the school’s overall fit.
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