Summary:
Mundelein has 10 schools—six elementary, three middle and one high school—serving students from the early grades through high school. The supplied test results cover seven schools; Fremont, Washington and Diamond Lake, which serve younger grades, have no scores in the data. Across tested schools, middle-grade ELA is a strength, but math results are weaker and vary sharply from school to school.
Fremont Junior High/Middle School leads the middle schools in 2025–2026, with 78% proficient in ELA, 50% in math and 78% in eighth-grade science; Fremont Intermediate School leads the grade 3–5 schools, with 73% in ELA and 59% in math. At the other end, West Oak Middle School has the lowest middle-school math result, 20%, compared with 40% statewide, while West Oak Intermediate School is lowest among the grade 3–5 schools in ELA (46%) and math (28%). The middle schools average 65% in ELA, above the 56% state result, but 35% in math, below the state’s 40%. Mundelein Cons High School is above the state in all three reported ACT subjects and has a 95% graduation rate versus 90% statewide.
Recent changes are mixed: across the six tested grade 3–8 schools, the average ELA position moved from about level with the state in 2024–2025 to 5 points above it in 2025–2026, while math remained about 1 point below. West Oak Middle’s ELA rose 19 points to 57%, but its math result remained far below the state; West Oak Intermediate’s ELA rose 11 points while math fell 3. SchoolDigger’s latest ranking percentiles are strongest for Fremont Junior High/Middle (80th) and Fremont Intermediate (77th), and lowest for both West Oak schools (27th); Mechanics Grove Elementary School is at the 43rd percentile. Low student–teacher ratios at West Oak—10.3 at the middle school and 9.2 at the intermediate school—do not correspond to stronger math scores in these results. For 2024–2025, free/reduced lunch eligible figures were 42% at Mechanics Grove and 60% at West Oak Intermediate; these are context, not an explanation of achievement.
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