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About Principia School

Serving children from infancy through grade 12, Principia School is a student-centered, future-focused coeducational day and boarding school. Creativity, critical thinking, and character growth are at the core of our program, which is grounded in the teachings of Christian Science. 

Read Our Story

How We Teach

Our Campus

Why Principia School?

Experiential Learning

Educational Travel

Arts for All

Culture of Excellence

College Readiness

Outstanding Boarding Program

A Community That Cares

Affordability

Spiritual Growth

The teachings of Christian Science underpin everything we do. We see every child as unlimited—in potential and ability.Get Inspired

Character Growth

Our approach reflects founder Mary Kimball Morgan’s focus on thinking fearlessly and living selflessly.Learn More

School Viewbook

Our newest viewbook provides insight on our curriculum, values, and community. Browse the viewbook online, or email us your address, and we'll be happy to mail you one.

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  • 13201 Clayton Road, St. Louis, MO 63131
  • 314.434.2100
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