Summary:
Zip code 61821 has one listed high school, Centennial High School, serving grades 9–12 with 1,476 students in Champaign CUSD 4. The school’s 2025–2026 test results were below state results in all nine reported grade-and-subject measures. Averaged across those tests, 37% of students met the proficiency measure, compared with 47% statewide—a 10-point gap. That across-the-board shortfall is the most important finding for families.
Centennial is the only school in the list, so there is no meaningful local top-to-bottom comparison. Within its results, science was the closest subject to the state average: the school’s subject average was 39%, versus 48% statewide, a 9-point gap. Math was the weakest relative area, averaging 28% versus 39% statewide, a 12-point gap. The largest individual shortfall was grade 9 PreACT math, at 26% compared with 42% statewide, 16 points behind. Attendance and completion measures also merit attention: chronic absenteeism was 37% versus 24% statewide, and the dropout rate was 5% versus 2%; the graduation rate was closer to the state figure, at 88% versus 90%.
Results changed unevenly from 2024–2025 to 2025–2026: grade 10 PreACT math rose from 23% to 30%, while grade 11 ACT English language arts fell from 43% to 36%. Across all nine matched tests, the school’s average declined by 2 points, and its average gap with the state widened by about 1 point. SchoolDigger’s statewide percentile ranking moved from the 57th percentile in 2023–2024 to the 30th in 2025–2026; it currently gives the school one star. These rankings are not proficiency scores. In 2024–2025, the student–teacher ratio was 13.4:1, and 51% of students were free/reduced lunch eligible—context about the school, not an explanation of its results.
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