Summary:
Reed Custer CUSD 255U has one high school, Reed-Custer High School, serving grades 9–12 with 397 students. The school’s 2025–2026 results show a clear difference by assessment: it was above Illinois on all six Grade 9 and 10 PreACT measures, but below the state on all three Grade 11 ACT measures. The most important takeaway is that PreACT results were a strength relative to the state, while ACT mathematics was the clearest academic concern.
As the only school in the area, Reed-Custer is both the top and bottom school in any within-area comparison; the more useful comparison is with Illinois. Its largest PreACT advantage was Grade 9 science, with 59% proficient versus 47% statewide, a 12-point gap. Its largest shortfall was Grade 11 ACT mathematics: 28% versus 40%, a 12-point gap. Other measures add positive context: graduation was 96%, compared with 90% statewide, and chronic absenteeism was 16%, compared with 24% statewide.
Results improved on most matched measures from 2024–2025 to 2025–2026, though not across the board. Grade 10 PreACT mathematics rose from 19% to 40%, a 22-point increase, and its gap with the state shifted from 16 points below to 4 points above. Grade 9 PreACT ELA moved the other way, falling 9 points, from 75% to 66%, while remaining 5 points above the state. SchoolDigger gives the district 3 stars and ranks it 321st of 738, in the 57th percentile; its reported percentile rose from 50 to 65 between 2023–2024 and 2025–2026. For context, 42% of students were free/reduced lunch eligible in 2024–2025, and the student-teacher ratio was 11.6 in that year.
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