About Us

Imagine a place where opportunity is everywhere, and students are seen as limitless. At Principia, we believe every student has everything they need to excel in the classroom, on the sports field, up on stage, and out in the community. We simply help uncover their boundless potential.

Much more than a pre-K-12 college-prep day and boarding school in St. Louis, Principia is founded upon principles that see students as boundless and divinely whole. Grounded in the teachings of Christian Science, a worldwide Christian denomination, Principia welcomes students from all faith backgrounds.

Here, students become critical and creative thinkers who can address challenges through effective problem-solving. Our 360-acre campus also offers a unique educational experience with beautiful indoor and outdoor learning spaces as well as state-of-the-art athletic facilities and fields.

Adventure and discovery await. Find your purpose at Principia School.

Lead with LOVE

LOVE is our core value as it underpins our beliefs and educational approach. Enveloped in a loving and supportive environment, we give students space and guidance, allowing their full potential to evolve and shine. Students begin to recognize their strengths, push beyond their comfort zone, and discover their place in the world.

By developing the whole person—spiritually, intellectually, physically, morally, and socially—students are equipped to conquer limitations and bring innovative perspectives to their experiences in college and beyond.

Value the Power of Prayer

Principia welcomes students from a variety of faith backgrounds who are eager to grow spiritually, embrace opportunity, and pursue possibility. Guided by the teachings of Christian Science, we nurture the love of good—in thought and action—while encouraging students to embrace their own spirituality.

Students learn that an elevated spiritual view of themselves and of those around them better equips them to handle challenges with grace and confidence. They discover that authentically living values that inspire, uplift, and heal can improve not only their own lives, but the world around them.

Explore and Expand Horizons

At Principia, students get their hands dirty, test their theories, and expand their horizons. Because we want students to not merely know but to understand, we design the learning experience with a focus on outcomes. We prepare students with skills such as reason, leadership, courage, selfless service, communication, and collaboration.

Students are challenged to put their understanding into practice through programs that provide hands-on, relevant experiences. Whether students are learning the principles of entrepreneurship or embarking on educational trips around the world, signature programs are designed to develop creative and critical thinkers.

Build Confidence and Self-reliance

Every day we “mark the perfect man” (Psalms 37:37). This guides us to see each other as whole and unlimited. We see the good in every student—and because we do, they see the good in themselves. From that starting point, all things are possible.

Every child is an individual with unique strengths and motivations. We encourage their journey to self-reliance and foster a sense of ownership in their own education. Students thrive when they take a hands-on approach to their own learning. They motivate themselves to make good decisions, take risks, and get involved. These are the bricks that build confidence.