KOSON Schools (DBA STEM School Highlands Ranch)
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About KOSON Schools (DBA STEM School Highlands Ranch)
STEM School Highlands Ranch is the flagship K–12 campus of KOSON Schools, a tuition-free public charter school in Douglas County, Colorado that delivers a STEM-integrated, problem-based learning program to elementary, middle and high school students.
KOSON Schools operates the STEM School Highlands Ranch campus and is expanding as a network; the organization emphasizes hands-on, project-based STEM instruction, college and career readiness, community partnerships, and continuous innovation to support student growth.
Notable achievements
501(c)(3) tax-exempt status
Operates as a tax-exempt educational nonprofit organization (EIN 27-4878116) and files annual nonprofit tax reports consistent with public charter school operations.
Regional STEM competition recognition
Students and teams have earned awards and recognitions in regional robotics and BEST/STEM competitions during recent seasons, reflecting active extracurricular STEM engagement.
Sustained enrollment and academic outcomes
The flagship campus serves a large K–12 population and reports student performance that has trended at or above state averages while expanding programs and partnerships.
At a glance
- Total assets
- $15.8M
- Annual revenue
- $21.7M
- Tax status
- 501(c)(3)School
- EIN
- 27-4878116
- Location
- Highlands Ranch, CO
- Website
- stemk12.org
- On Mahalo since
- November 2025
Financial figures from the IRS Business Master File, the IRS’s registry of tax-exempt organizations.
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