Rainier Prep

As a tight-knit middle-grades school in Seattle, Washington, Rainier Prep instructs 359 students from grades 5 through 8, one of the schools within Rainier Prep Charter School District. That puts it 38% smaller than the typical public school in Washington, which averages around 577 students.

Rainier Prep is a school of Rainier Prep Charter School District, the district that handles curriculum, staffing, and budget for the campus.

In terms of who attends, Rainier Prep reports that the most-represented group is Black (51%), with the rest of the student body spread across multiple groups. Beyond that, the school shows 30% Hispanic, 8% Asian, 5% White, 5% multiracial. The wider county runs roughly 7% Black, putting the school's mix meaningfully more Black than the area baseline.

Looking at school resources, Rainier Prep logs 25 full-time-equivalent teachers, putting the student-to-teacher ratio at about 14.7:1. The state averages around 18.9:1, so this campus is tighter than the state norm typical. About 74% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is noticeably above King County's rate of about 38%.

After controlling for student poverty, Rainier Prep sits in the top 10% of Washington schools after the BeatsExpectations adjustment. Predicted proficiency for the school's FRL share is roughly 30.5%; actual is 59.0%, +28.5 points clear of the demographic baseline.

Across the wider county, census data for King County shows median household earnings sit near $124,746, about 57% of the adult population holds a bachelor's degree or above, and roughly 5% of residents live below the federal poverty line. In all, King County runs 544 public schools (combined enrollment of about 278,492 students), of which Rainier Prep is one.

Beverly Park Elem at Glendale is the nearest neighboring public school, about 0.2 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius. Ranking that nearby cluster on reported proficiency puts Rainier Prep at 1st of 6; the average score across the group is 22.3%.

Rainier Prep operates from a residential location. Rainier Prep operates as a public charter school, meaning it is publicly funded but governed independently of the surrounding district's traditional schools.

Five-year trend. Rainier Prep's enrollment has rose 8% since 2018, when it stood at 333 (now 359). The Black share of enrollment rose from 36% to 51% over that span.

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