Summary:
ZIP code 98498 has five public elementary schools serving prekindergarten through fifth grade in the Clover Park School District, with about 1,745 students and varied levels of academic performance and student need.
Idlewild Elementary School is the clear standout, ranking in the 54th statewide percentile and leading the area in 2025–26 English language arts, math, and science. It also made the largest improvement, rising from the 18th percentile three years earlier. Its science result of 67.16% was especially strong. Lake Louise Elementary School ranks second locally, with solid ELA and math results above the district averages. It has the area’s lowest student-teacher ratio and is particularly competitive in fifth-grade ELA, although fifth-grade math and science are areas for improvement. Oakbrook Elementary School offers the most balanced profile, performing above the district in all three tested subjects without a major overall weakness.
Custer Elementary School has a notable science strength but a serious math weakness, especially in fifth grade, where only 8.33% of students met the reported standard. Tillicum Elementary School ranks lowest in the group, though its statewide ranking has gradually improved and its math results are unusually consistent across grades. Across all five schools, average performance is above the district in ELA, math, and science but below the state, with math the most important shared challenge. Science is the closest subject to statewide performance. Families comparing schools should look beyond overall rankings and consider the combination of grade-level results, subject strengths, recent trends, and the school environment.
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