Lake Forest CHSD 115

Lake Forest CHSD 115 has one public school, Lake Forest High School, serving grades 9–12 in Lake Forest. The school’s 2025–2026 results also show strong graduation and attendance measures: its graduation rate was 99%, compared with 90% statewide, and chronic absenteeism was 10%, versus 24% statewide. Most importantly, the school scored above Illinois in every reported subject and grade, with advantages of 28 to 45 percentage points.

Because the district list contains only one school, there are no local top- and bottom-performing schools to compare; Lake Forest High School is both the sole option and the standout in the data. Its largest lead over the state was in grade 11 ACT mathematics, where 85% met the benchmark compared with 40% statewide, a 45-point gap. Its smallest was grade 9 PreACT ELA: 90% compared with 62%, a 28-point gap. SchoolDigger ranks the school 10th of 738 districts, in the 99th percentile, and gives it five stars.

Recent results were generally strong, though grade 10 PreACT results are a counterpoint. From 2024–2025 to 2025–2026, grade 11 ACT scores rose by 6 points in ELA, 7 in mathematics and 4 in science, while the school’s advantage over the state widened in all three subjects. Grade 9 PreACT results also improved relative to the state across all subjects; grade 10’s advantage narrowed in all three, as ELA and science scores fell and mathematics rose slightly. SchoolDigger’s historical ranks were 12th of 697 in 2023–2024, 14th of 698 in 2024–2025 and 13th of 620 in 2025–2026. The student–teacher ratio was 10.3:1 in 2024–2025; 5% of students were free/reduced lunch eligible in 2021–2022, an older context measure.