Summary
Millbrook High is a large public high school in Winchester, Virginia, serving 1,550 students in grades 9–12 as part of Frederick County Public Schools. The school has declined sharply over the past decade, falling from a 4-star, 72nd-percentile state ranking in 2015–16 to a 1-star, 23rd-percentile ranking in 2025–26 — the lowest among nearby high schools including John Handley High, Sherando High, James Wood High, Warren County High, Strasburg High, and Clarke County High. About 47% of students qualify for free or reduced-price lunch, and per-pupil spending is $9,780 with a 15.6 student-teacher ratio.
Millbrook's graduation rate of 89.9% is below the state average of 92.3% and below every nearby school, while its 5.7% dropout rate exceeds the state average. Chronic absenteeism sits at 21.1%, far above the state rate of 14.8% and higher than most nearby schools. The school's most striking pattern is strong 9th-grade performance followed by a collapse in upper grades: 9th-grade Biology proficiency is 89.29%, but 11th-grade Biology drops to 29.17% versus 63.49% statewide. Similarly, 11th-grade reading proficiency of 79.17% is the lowest among nearby schools, and 10th-grade reading is just 37.5% versus 63.92% statewide. By contrast, 9th-grade math is a clear strength, with Geometry at 94.92% and Algebra II at 100%. James Wood High, just four miles away in the same district, illustrates the gap: a 95.0% graduation rate, 2.9% dropout rate, 88.78% 11th-grade reading, and higher per-pupil spending of $10,694.
There are genuine bright spots: strong early math results, and white and Asian students rank near the 60th–65th percentiles statewide. However, significant equity gaps exist — English Language Learner students rank in the 1st percentile statewide and Hispanic students in the 11th. Poverty alone does not explain Millbrook's outcomes; Strasburg High serves far more low-income students yet posts a 98.6% graduation rate and 90.26% 11th-grade reading. For parents, the key takeaway is that Millbrook has identifiable strengths in early coursework but needs targeted intervention around attendance, upper-grade literacy and science, and support for English learners, Hispanic students, and low-income students. This is not a one-year blip but a decade-long trend that warrants close attention.
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