Summary
Flatirons Elementary School is a small K-5 public school in central Boulder, Colorado, serving 163 students within the Boulder Valley School District No. Re2. The school is part of one of the highest-performing districts in the state — ranked 5th out of 115 Colorado districts with a 5-star rating — and offers a notably low student-teacher ratio of 13.8, which supports a close-knit, individualized learning environment. Academically, Flatirons is a strong performer, ranking 91st out of 943 Colorado elementary schools in 2025-26, placing it in the top 10% of schools statewide.
In English Language Arts, 79.2% of Flatirons students were proficient in 2025-26, well above the district's 65.3% and the state's 44.7%, and math proficiency reached 62.0% versus the district's 56.1% and the state's 37.3%. Science is the school's main academic vulnerability: 52.4% of 5th graders were proficient in 2025-26, below the district average of 55.5% and a decline from 59.1% two years prior. Attendance, however, is a major strength — only 10.6% of students were chronically absent in 2024-25, compared to 17.5% districtwide and 28.4% statewide. While Flatirons outperforms most schools, it operates in one of Colorado's most competitive elementary school clusters: nearby Bear Creek Elementary, High Peaks Elementary, and Eisenhower Elementary all post proficiency rates in the mid-to-high 80s in ELA and math.
With just 163 students, Flatirons offers a distinctive blend of small-school intimacy and strong academics. Its 18.4% free/reduced-lunch rate places it in a middle demographic position among nearby schools, yet its test scores align much more closely with the lower-poverty, higher-scoring schools in the area. Families should note that grade-level proficiency can fluctuate from year to year due to small cohorts, and the school's science scores are worth monitoring. Overall, Flatirons is a consistently high-performing school with excellent attendance, a low student-teacher ratio, and a positive record of supporting strong outcomes — making it a compelling option for families seeking a small, stable school in the Boulder area.
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