Mapleton Expeditionary School of the Arts

Mapleton Expeditionary School of the Arts (MESA) is a small, arts-themed public high school in Thornton, Colorado, serving 393 students in grades 9–12 as part of the Mapleton School District No. 1. The school shares a campus with several other small high schools, including Academy High School and Mapleton Early Career Preparation, and serves a high-need student population, with about 69% of students qualifying for free or reduced lunch and a chronic absenteeism rate of 46% in 2024–25.

Reading and writing is a relative strength at MESA. On the 2025–26 SAT, 41% of 11th graders were proficient in reading and writing, beating the district average of 38% and far exceeding nearby Thornton High School (18%) and Global Leadership Academy (28%). However, math is the school's biggest academic weakness, with just 12% of students proficient on the SAT math section compared to 32% statewide. MESA also trails its arts-focused counterpart, Performing Arts School on Broadway, which ranked in the 28th percentile overall versus MESA's 10th, and Academy High School posted stronger reading scores (49% vs. 41%) and math scores (26% vs. 12%) on the same campus.

There are some encouraging signs. MESA's graduation rate climbed to 87.0% in 2024–25, above the state average of 85.6% and well above the district's 78.9%. English Learner students earned a 4-star rating and ranked in the 77th percentile statewide in 2022–23, an exceptional result for a school in the bottom tier. Still, significant challenges remain: chronic absenteeism affects nearly half of students, male students consistently underperform relative to female students, and Gifted and Talented students have ranked in the 1st–2nd percentile statewide for three consecutive years. While MESA shows genuine pockets of strength in literacy and graduation, math achievement and attendance will need substantial improvement for the school to rise meaningfully in the state rankings.