Summary:
Schools in ZIP code 98564 include three schools serving 644 students in Mossyrock, Washington: Mossyrock Elementary School serves grades K–6, while Mossyrock Junior/Senior High School and Mossyrock Academy serve grades 7–12; all are part of the Mossyrock School District.
For parents comparing the two larger schools, Mossyrock Junior/Senior High School has the stronger overall academic profile in several areas. Its ELA proficiency was 51.94%, nearly matching the Washington rate of 52.81%, and its reported graduation rate was 91%, well above the state rate of 82.6%. Its science performance also exceeded the district rate. However, mathematics is a significant weakness, with only 21.71% of students proficient compared with 43.11% statewide. Mossyrock Elementary School posted lower ELA proficiency at 37.36%, but its math rate of 29.83% was slightly above the district’s 26.45%. Elementary science proficiency was 33.33%. The most notable elementary concern is fifth-grade math, where proficiency was only 11.36%, while third-grade math was considerably stronger at 45.95%.
Both larger schools have seen declines in their state ranking percentiles since 2023–2024, with the elementary school falling from the 41st to the 28th percentile and the high school from the 43rd to the 32nd percentile. The clearest districtwide improvement priority is mathematics, especially in grades 7–10 and fifth grade, while the district should preserve the practices supporting high school ELA and graduation. Mossyrock Academy offers a much smaller setting, with 16 students and an 8.5-to-1 student-teacher ratio, but its current assessment results are suppressed and its available graduation data is outdated. Its performance cannot be fairly compared with the larger schools from the available information.
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