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boy in library with book
girl playing brass instrument
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boy in greenhouse with magnifying glass
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group of middle school students in hallway
student in art class drawing figures

We Are Flagstaff Academy

Award-winning programs from preschool through 8th grade. Tuition-free for grades K-8 and open to all. A safe, welcoming place to learn. That's why families in your community choose us for their child's education.
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Our Mission

The mission at Flagstaff Academy is to develop students who are equipped to be well-rounded, ethical leaders in the world community with a foundation based on science and technology.
 
Flagstaff Academy's Guiding Principles:
  • Provide a preschool through eighth grade Core Knowledge-based education with a hands-on science and technology focus, as well as attention to the arts
  • Foster an environment that challenges students to achieve their academic potential
  • Promote, value, and recognize academic achievement and creativity
  • Respect the individual, classroom, school, community, and world


Academic and School Achievements


Flagstaff Academy is recognized as a leader in rigorous, caring education across the State of Colorado. Our achievements speak for themselves: 
 
  • 2022 & 2019 Colorado Trailblazer School to Watch (only charter school in Colorado!)
  • Highly Effective Schools Through Libraries designee (1 of only 17 schools in the state since 2016 to receive this recognition)
  • Two-time National Association of Special Education Teachers Exceptional Charter School
    Three-time John Irwin School of Excellence Winner (Colorado Department of Education Top 8% of Schools Achievement) Winner
  • Multi-year Corden Pharma Regional STEM Fair Winners
    Middle School State Robotics Champions
  • Award Winners
    Top Ten in Colorado in English Language Proficiency Assessment (2014 and 2016)
  • #1 in Colorado in English Language Proficiency Assessment (2015)
  • High School Readiness: A majority of our alumni take Honors, Advanced Placement, and International Baccalaureate courses, assume leadership roles in high school, and move on to four-year colleges, as well as vocational schools, and military service
  • Flagstaff Academy is a Colorado Health Links Certified Healthy Workplace, the only charter school in Colorado to receive this designation
Read the Flagstaff Academy Mission

Upcoming Events

Preschool Welcome Picnic

Time: 4 PM – 5:30 PM
Location: Lefthand Creek Park, East Shelter 1800 Creekside Dr, Longmont, CO 80504

Elementary School Field Day

Time: 9 AM – 2 PM
Location: Outdoors-O-North Elementary Field (250), Outdoors-O-South Elementary Field (30), Gym-Gym-Gym East (50), Gym-Gym-Gym West (50)
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About Our School

  • 2005 Year Founded
  • 800 Enrollment
  • 23 Average Class Size
  • 15 Extracurriculars Offered
Pencils and books

Our Guiding Principles

  • Provide a preschool through eighth grade Core Knowledge-based education with a hands-on science 
    and technology focus, as well as attention to the arts.
  • Foster an environment that challenges students to achieve their academic potential.
  • Promote, value, and recognize academic achievement and creativity
  • Respect the individual, classroom, school, community, and world.
Show More Guiding Principles

Recent News

kindergarten boy looking through magnifying glass

Kindergarten Roundup This Thursday

Join us this Thursday, April 16, from 4:45 - 6:00 p.m. for our Kindergarten Roundup enrollment event. This is a great opportunity to meet Flagstaff Academy leadership, the kindergarten teaching team, and tour the kindergarten classrooms.
elementary student on playground

Now Accepting Applications for 26/27

📢 Your child’s future starts at Flagstaff Academy! Flagstaff Academy open enrollment for the 26/27 school year continues through Oct. 1, 2026.

Join a school where students are known, supported, and challenged through award-winning academics, small classes, and hands-on STEM learning that builds confidence and character.

Flagstaff Academy Alumnus Named Arts Student of the Week

Niwot High School sophomore and Flagstaff Academy alumnus, Peyton Cross, was featured in the Left Hand Valley Courier for their commitment to the arts. Since the 6th grade, Cross has played percussion in various school bands. Beginning at Flagstaff Academy, Cross gained a skill and passion for music. In the transition from middle to high school, it was clear to them that they wanted to continue with music.
School staff in the shape of a 20

Flagstaff Academy Charter School Celebrates 20 Years of Excellence

Flagstaff Academy Charter School opened its doors on its 20th year of operation, marking two decades of academic innovation, community engagement, and student-centered learning. Since its founding in 2005, Flagstaff Academy has grown from a small, hopeful charter to Longmont’s premier tuition-free public charter school, now serving nearly 800 students and employing close to 100 dedicated teachers and staff.
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