Summary:
ZIP code 61533 has three Illini Bluffs schools serving prekindergarten through grade 12: Illini Bluffs Elementary School (PK–5), Illini Bluffs Middle School (6–8), and Illini Bluffs High School (9–12). Together, they enroll 855 students. Across the reported 2025–26 results, schools are generally above state benchmarks, with a notable exception in elementary math: third- and fifth-grade results are slightly below the state. The most important takeaway is a favorable overall picture, alongside specific elementary-grade math results parents may want to watch.
The middle school stands out in IAR English language arts, with 76% proficient compared with 63% at the elementary school and 56% statewide; its result is 20 points above the state, versus 7 points for elementary. The middle school also leads in All Grades math, 46% to 44%, though both schools are above the state’s 40%. At the grade level, elementary fifth-grade ELA reaches 82%, while middle-school eighth-grade ELA is 90%. The clearest elementary math concerns are third grade at 48% and fifth grade at 35%, each about 1 point below its state result. High-school results are above state benchmarks in every listed subject; its largest margin is ninth-grade PreACT math, 65% versus 42% statewide, a 22-point lead.
Recent changes favor the middle school: All Grades ELA rose 10 points and math 6 points from 2024–25 to 2025–26, while eighth-grade science gained 24 points. Elementary results were mixed: its All Grades leads over the state narrowed in ELA and math, but fifth-grade science rose 14 points. High-school 10th-grade PreACT scores improved in all three subjects, while 11th-grade ACT ELA fell 4 points. SchoolDigger’s latest statewide percentiles are 75th for middle school, 83rd for high school, and 58th for elementary. In 2024–25, student-teacher ratios ranged from 10.7 at high school to 14.5 at middle school; free/reduced lunch eligible figures that year were 24% to 31%. These context measures do not explain test results, and high-school scores are not directly comparable with IAR results.
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