Summary:
ZIP code 58237 has three schools in Grafton: Century Elementary School (PK–6, 532 students), Grafton Junior High School (grades 7–8, 137 students), and Grafton High School (grades 9–12, 284 students). Results vary by subject, with no single school leading across the board. The clearest concern is Grafton High’s 2025–2026 science result: 20–28%, or 11–19 points below the state’s 39%.
Grafton High stands out in math, scoring 50–58% compared with 42% at Century and 40–48% at the junior high; it is 8–16 points above Century and 2–18 points above the junior high. In science, however, the high school is lowest: its 20–28% is 7–23 points below Century’s 35–43% and 2–18 points below the junior high’s 30–38%. Century is the reading bright spot at 57%, matching the state; the junior high’s 45–53% is 4–12 points lower. Century also has a notable grade-level contrast: grade 3 reading is 70–78%, above the state by 10–18 points, while grade 3 math is 35–43%, below it by 16–24 points.
Math scores rose at all three schools from 2024–2025 to 2025–2026: 24 points at Century, 31–39 points at Grafton High, and 16–24 points at the junior high; the state rose 13 points. Science moved differently: Grafton High fell from 39% to 20–28%, while Century rose from 34% to 35–43%. SchoolDigger ranks Century 155 of 216 (28th percentile, 1 star), Grafton High 70 of 129 (46th percentile, 2 stars), and the junior high 52 of 65 (20th percentile, 1 star). For 2024–2025, student-teacher ratios were 8.8 at Century, 14.2 at Grafton High, and 7.6 at the junior high; all reported free/reduced lunch eligible shares that year: 49%, 44%, and 50%, respectively. These are useful context, not explanations for school results. Some current scores are ranges, so they do not establish an exact ranking in every subject.
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