Schools in Zip Code 61818

Zip code 61818 has two schools serving prekindergarten through grade 12 in Cerro Gordo CUSD 100: Cerro Gordo Elementary School (PK–5, 246 students) and Cerro Gordo Junior and Senior High School (grades 6–12, 228 students). The high school’s 2025–26 results are especially strong in ELA and science, while elementary results vary substantially by grade. The clearest shared concern is math: both schools’ all-grades results are below the state.

The high school stands out in ELA, with 78% proficiency across its tested grades compared with 56% statewide, a 21-point advantage; its listed science results are also above state results in grades 8–11, by 3 to 22 points. The elementary school’s strongest result is fifth-grade science: 71%, compared with 48% statewide, or 24 points higher. Math is the weakest area overall: elementary proficiency is 35% versus 40% statewide, while the high school is at 24%, 16 points below the state. Notable grade-level shortfalls include elementary fourth-grade math (13 points below state results) and high-school seventh-grade math (12 points below).

Recent trends differ: elementary fifth-grade science rose 34 points from 2024–25 to 2025–26, while high-school all-grades math fell 11 points. SchoolDigger’s statewide ranking percentile is 45 for the elementary school, down 12 points since 2023–24, and 74 for the high school, up 27 points over that period; SchoolDigger rates them 2 stars and 4 stars, respectively. The 2024–25 student–teacher ratios are 13.0 at the elementary school and 11.2 at the high school; free/reduced lunch eligible was 49% and 41%, respectively, in 2024–25. These are observations about the schools, not explanations for their results. Because the schools serve different grade groups, their all-grades scores are not a like-for-like comparison.