September High School
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September School is a private high school and middle school in Boulder, CO, leading the way in relationship-based education. We are here for you, and above all else, we're here for your kids. Students learn what they need to succeed academically. We explore learning styles and offer accommodations to any student who finds they benefit from them.

Students with learning differences all learn together. We see each student as a holistic individual and value social-emotional growth AND academic progress. Teenagers are developing important life skills such as self-advocacy, conflict resolution, stress-management, and empathy. Classes in human development, mindfulness, group dynamics, and yoga alongside math, science, English, and social studies develop well rounded individuals.
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For more than 40 years, September School has been one of the most progressive high schools in Boulder, Colorado, providing relationship-based education, learning, and achievement opportunities in academic and personal growth for students in grades 9-12. While other high schools in Boulder focus exclusively on academics, September School values social and emotional learning in addition to traditional academic growth.
At September School, we're here to serve our students. We serve students with a wide variety of interests who come from a wide variety of backgrounds. Whatever brought them to September School, our faculty and staff are passionate about getting to know each teen and learning about their talents, strengths, and weaknesses.
September High School is an intimate and supportive community that fosters individual development and reawakens the love of learning. We empower our students to be critical thinkers, lifelong learners, and responsible citizens. What's so different about September School? Our relationship-based approach is the key way our students thrive.
September School is Boulder's longest-serving independent, private high school. We offer a program of relationship-based learning that allows teens to be themselves. Our students learn to thrive in an academic environment while preparing for a positive, impactful life after high school. If you're looking for schools for troubled teens, you've probably considered a lot of options.
Help our students reawaken their love of learning with our relationship-based education approach. For over 40 years, we have been serving families in the Boulder area and along the Front Range. Our innovative approach to education has a proven track record and is accredited by AdvancED.

If you're researching top high schools in Boulder, CO, for your teen, we invite you to experience September School first-hand to understand best what we are all about.Call us on (303) 443-9933 or contact us online to schedule a visit. We would love to meet you. Supporting a diverse student population in achieving academic success and a balanced school life.
Reviews (6)
Joan Doolittle
Joan Doolittle
Jan 20, 2019
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Imagine the kind of learning that happens when a school meets a student wherever they are. Imagine what learning might be like in a school that holds as a core value the quality of relationship—between students, teachers and staff. That's the exceptional experience September School creates every day for all its students. And I’m grateful for the profound impact the school has on my own child.
Scott Dimetrosky
Scott Dimetrosky
Dec 02, 2018
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September School offers a small, intimate environment with amazing teachers and incredible support for all students. Our student, who was not happy in a large Boulder high school, wakes up happy and thrilled to go to school each day. We are so thankful to have discovered the September School!
Brus Westby
Brus Westby
Oct 17, 2018
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I was the Principal and Director of September School from 1983 to 2006. During that time, I saw many students and teachers come through our doors. Everyone, myself included, was looking for a meaningful learning experience in which we could receive the support to further develop academic, professional and social skills. When it was our time to leave, we each felt sad to say goodbye to such a vibrant and supportive community, but also well prepared to face our next challenge, whether it was college, a new job or, in my case, retirement.
One example of the strength of our community was in the process
Joy Redstone
Joy Redstone
Sep 15, 2018
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This place is warm and engaging, but has so much research and experience behind its approaches. Our daughter was struggling in public school due to learning difficulties and emotional challenges. She loves this place as a student and we as parents love it as we’ll, especially it’s relational approach
Andrew Brandt
Andrew Brandt
Jul 28, 2018
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The best private school in Colorado (and maybe the country). Sep School has beed a godsend for my family. We couldn't be happier with Kelly and her staff.
Melanye Levin
Melanye Levin
Jun 15, 2018
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September School has been the best experience for my daughter. I really appreciate the inclusive community and mutual respect between students and teachers. People are actually nice to each other! Kids are treated with respect and the staff is so caring. What a difference from regular high school.