Corsica-Stickney 21-3

Corsica-Stickney 21-3 has three schools serving students from prekindergarten through grade 12: an elementary school, a junior high, and a high school. On the comparable all-grades Smarter Balanced results for 2025–26, the elementary school was well ahead of the junior high and the state in both subjects. The clearest area-wide standout is the elementary school’s math performance: 81% proficient, compared with 44% at the junior high and 44% statewide.

Corsica-Stickney Elementary stands out on Smarter Balanced: its 70% ELA result was 16 points above the junior high’s 54%, and its math result led by 37 points. It also exceeded state rates by 21 points in ELA and 37 points in math; fourth graders were especially strong, with 83% proficient in ELA and 96% in math. The junior high’s all-grades results were near the state—54% in ELA and 44% in math—but grade-level math varied sharply: sixth grade was 19 points above the state, while seventh and eighth grades were 11 and 16 points below. The high school’s ACT results were weak in ELA and math compared with state rates (25% versus 48%, and 13% versus 34%), but stronger in science (56% versus 45%); graduation was 100%, compared with 88% statewide. High school ACT results are not directly comparable with the other schools’ Smarter Balanced results.

Recent SchoolDigger rankings show different trajectories: the elementary school rose from the 89th to the 95th percentile between 2023–24 and 2025–26, while the junior high fell from the 81st to the 58th and the high school from the 98th to the 25th. In 2025–26, SchoolDigger gave the elementary school five stars, the junior high three, and the high school one. Across the two schools with comparable all-grades results, the average lead over the state widened from 11 to 13 points in ELA and from 15 to 19 points in math. Context measures differ too: in 2024–25, free/reduced lunch eligible shares were 21% at the elementary school, 29% at the junior high, and 15% at the high school; student-teacher ratios were 13.9, 10.5, and 9.2, respectively. These are observations about the schools, not explanations for their results.