Summary:
Zip code 80299 contains a single high school, Mapleton Expeditionary School of the Arts, which serves grades 9 through 12 in Thornton, Colorado, as part of the Mapleton School District No. 1. This small arts-focused school enrolls 393 students, with nearly 70% qualifying for free or reduced lunch, making it a high-poverty school with a distinct Expeditionary Learning / arts mission.
The school's biggest bright spot is its graduation rate of 87.0%, which exceeds both the district rate of 78.9% and the state rate of 85.6%. However, nearly half of students (46.0%) are chronically absent, far above the state average of 28.4%, and the dropout rate of 3.3% is double the state average. Academically, math proficiency is a critical weakness: only 12% of 11th graders scored proficient on the SAT math exam versus 32% statewide, and 9th and 10th grade PSAT math proficiency sits at just 12–14% compared to roughly 40% statewide. Reading and writing scores are closer to district averages, and in both 10th grade PSAT and 11th grade SAT reading, the school slightly outperforms its district.
The most interesting finding is the disconnect between strong graduation outcomes and very weak academic proficiency. The school clearly supports many students toward graduation through its arts-based, non-traditional approach, but that engagement has not translated into measurable academic gains, especially in math. The school's percentile ranking has declined from the 15th to the 10th percentile over the past two years, meaning it is not improving as quickly as other Colorado high schools. For parents, this school offers a supportive, arts-centered environment that graduates students at an impressive rate given the challenges of high poverty and absenteeism, but families should be aware of the significant gaps in academic proficiency, particularly in mathematics.
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