Not every King County school district is bringing home a report card worth hanging on the refrigerator.
Education review website Niche has released its 2027 school district evaluations, and while several districts earned top marks, three found themselves at the other end of the grading scale.
Of the 18 public school districts included in Niche’s latest King County evaluations, the lowest overall grade was a C. Two other districts received C+ grades, leaving them tied for the county’s second-lowest overall mark.
That’s quite a contrast with Mercer Island, Bellevue and Issaquah, which all received A+ grades.
But there’s more to these report cards than a single letter. Some districts received surprisingly strong marks in individual categories, even as their overall evaluations left room for improvement.
Here’s a closer look at the three districts receiving Niche’s lowest overall grades in King County.
Highline School District — Overall Niche Grade: C+
Highline School District serves approximately 18,072 students across Burien, Des Moines, Normandy Park, SeaTac and White Center, making it by far the largest of the three districts featured.
According to Niche’s Highline School District report card, approximately 35% of students demonstrate proficiency in reading, while 26% meet proficiency standards in math.
The district has an 18:1 student-teacher ratio and a reported graduation rate of 79%.
Academics and teachers both received C+ grades, while administration earned a C−.
But Highline has some brighter spots.
The district received an A for diversity and a B+ for college preparation, suggesting its overall grade doesn’t tell the whole story.
In fact, Niche places Highline among Washington’s 15 most diverse school districts.
Not exactly a straight-A report card, but certainly one with some notable strengths.
Tukwila School District — Overall Niche Grade: C+
Tukwila School District shares Highline’s C+ overall grade, although its academic numbers and enrollment paint a somewhat different picture.
Serving approximately 2,886 students, Tukwila has a student-teacher ratio of 20:1.
According to Niche’s Tukwila School District profile, 31% of students are proficient in reading, while 22% meet proficiency standards in math.
Its reported graduation rate stands at 84%, five percentage points higher than Highline’s figure.
Academics and administration both received C grades, while teachers earned a B−.
But here’s where things get interesting.
Tukwila earned an A+ for diversity, one of its strongest marks. Niche also gave the district a B+ for college preparation and B− grades for athletics and resources and facilities.
The district ranks among Washington’s 10 most diverse school districts in Niche’s 2027 evaluations.
That’s a pretty impressive distinction for a district whose overall grade landed near the bottom of King County’s list.
Skykomish School District — Overall Niche Grade: C
King County’s lowest overall Niche grade belongs to a district that’s considerably smaller than its suburban counterparts.
Nestled in the Cascade Mountains, Skykomish School District serves just 52 students, according to Niche’s district profile.
That’s fewer students than many individual classrooms across the county.
The district has a student-teacher ratio of just 5:1, a dramatic contrast with Highline’s 18:1 and Tukwila’s 20:1.
Yet Skykomish received an overall C, the lowest grade among the 18 districts included in Niche’s King County evaluations.
Its academics and teachers categories both received C+ grades, while diversity and administration earned C− marks.
But the report card has a few surprises.
Skykomish received an A+ for resources and facilities and an A− for clubs and activities.
Those are substantially stronger evaluations than its overall grade might suggest.
Niche does not publish reading proficiency, math proficiency or graduation rate figures on Skykomish’s district profile, limiting direct academic comparisons with larger districts.
And with an enrollment of just 52 students, Skykomish operates on an entirely different scale from the sprawling school systems elsewhere in King County.
For perspective, Highline serves nearly 350 times as many students.
A C isn’t exactly the grade most families hope to see, but the district’s unusually small size and stronger evaluations in several categories deserve consideration.
How Does Niche Grade School Districts?
A district’s overall grade isn’t determined by test scores alone.
According to Niche’s methodology for its 2027 Best School Districts evaluations, academics account for 50% of the assessment.
Teacher quality contributes another 15%, while diversity and student and parent satisfaction each account for 12.5%.
Resources and facilities make up 5%, with extracurricular activities and athletics contributing 2.5% each.
The evaluations draw on information from the U.S. Department of Education, standardized test results and feedback from students and parents.
That combination helps explain why districts with different academic performance figures can receive identical overall grades.
Importantly, this comparison focuses on Niche’s overall letter grades rather than its numerical Best School Districts rankings.
Highline and Tukwila are tied at C+, while Skykomish received the county’s lowest grade at C.
The reading and math proficiency figures cited in the district profiles come from Washington’s 2024–25 statewide assessments. Additional performance information is available through the Washington Office of Superintendent of Public Instruction’s data portal.
What Do the Grades Really Mean?
King County’s school districts vary enormously in size, student demographics, resources and educational programs.
Comparing a mountain community serving 52 students with a suburban district educating more than 18,000 children isn’t exactly an apples-to-apples exercise.
And receiving one of the county’s lowest grades doesn’t automatically mean a district provides a poor education or ranks among Washington’s worst-performing school systems.
Niche’s evaluations offer one perspective, not a definitive judgment on the quality of every classroom.
Families considering a school district should also examine individual schools, available programs, graduation outcomes and other measures that matter to their children.
Because sometimes, the most interesting part of a report card isn’t the final grade. It’s everything that went into earning it.
