Summary:
ZIP code 67030 has two schools serving PK–8—St. Marks School and Colwich Elementary—both in the Renwick district. Both schools are above Kansas’s all-grades proficiency rates in ELA, math and science; together, their average is 64% in ELA, 55% in math and 48% in science, compared with state rates of 46%, 41% and 38%. ELA is the area’s strongest subject relative to the state, while science is the least strong.
There is no single school leader across all subjects: Colwich Elementary leads in ELA at 66%, compared with 61% at St. Marks School, a 6-point advantage. St. Marks leads in math, 56% to 54%, and has the clearest edge in science, 56% to 40%, a 16-point difference. Grade-level results can look quite different from the all-grades picture: Colwich’s grade 8 math proficiency is 22%, 17 points below the state rate for that grade.
Recent trends also differ by school and subject. Colwich’s ELA rate rose 12 points from 2024–25 to 2025–26, while St. Marks’ fell 5 points; math changed little overall, but science fell at both schools, by 7 points at St. Marks and 10 at Colwich. SchoolDigger’s rankings moved in opposite directions: St. Marks went from the 80th to the 67th percentile over three years, while Colwich rose from the 69th to the 81st. St. Marks has 315 students, a 13.7 student-teacher ratio and a 10% free/reduced-lunch rate; Colwich has 227 students, a 10.2 ratio and a 28% rate. These school characteristics are descriptive and do not explain the score differences.
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