The top reported proficiency rate is 67% in English language arts. The lowest is 49% in Science.
Original Research by School Decision on Rainier Prep Charter School District
Rainier Prep Charter School District is a single-school district in King County, Washington, serving grades five through eight. Because it is a middle-grade-only charter district, several measures commonly used to assess a district’s overall performance do not apply here. There is no graduation rate to report, as the district does not serve high school students, and state testing data is available only for the grades it teaches.
Academically, the district’s students perform above the midpoint among King County’s districts on an overall proficiency index that averages results across tested subjects and grades. In English language arts, proficiency rates are strongest in the earlier grades, with a clear majority of fifth and sixth graders meeting the state bar. Those rates step down in seventh grade and again in eighth grade, where roughly half of students are proficient. Math follows a similar grade-by-grade decline, starting solid in fifth and sixth grades and dropping by eighth grade. Science results show a wide gap: a strong majority of fifth graders are proficient, but in eighth grade the share drops to about a third. The district has only one year of assessment data, so no trend is available to say whether these patterns are new or longstanding.
Chronic absenteeism in the district sits above the midpoint among King County’s districts, meaning a meaningful share of students miss enough school to draw attention. A parent exploring this school may want to ask the school directly about its attendance outreach and what supports are in place for students who fall behind.
The district’s per-pupil current spending falls in the upper half of the middle range among the county’s districts, which suggests resources are broadly in line with many of its peers while not reaching the very highest spenders in the county.
Enrollment is small, split roughly evenly across four grade levels. The student body is majority Black, with a substantial Hispanic population and smaller shares of Asian, multiracial, and white students. Data on students with disabilities and English learners was not available in the state reporting; the same is true for economic disadvantage measures, so it is not clear what share of students receive free or reduced-price lunch.
No locale brief was provided for the district’s location, and the district brief turned up no parent-relevant changes or strategic initiatives from recent years. What is available is a straightforward snapshot of a small, single-school charter district serving a middle-school population with academic results that are solid in the earlier grades and trail off by eighth grade, especially in math and science. Families considering this school will want to learn more about how the school supports students through the transition from elementary to high school readiness and what steps are taken to keep attendance strong.
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