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Principia School
ISACS Membership status: Fully Accredited Member School

Address: 13201 Clayton Road
St. Louis, MO 63131
Telephone: (314) 434-2100
Fax: (314) 275-3583
Web site:
Grade Levels: PS-12
Enrollment: 390
Boarding/Day: Boarding & Day
Gender: Coed
Religious Affiliation: Christian
School Description:

For more than a century, Principia School has dedicated itself to equipping students to think vigorously, fearlessly, and selflessly in every aspect of their lives—and to act and live accordingly.

Principia’s student-centered, experiential approach emphasizes hands-on learning, cross-disciplinary connections, and the practical application of knowledge and skills. Our college-preparatory program is built around the respected Understanding by Design© curricular framework and prioritizes creativity, character, and a global outlook. Multiple opportunities for leadership, service, and educational travel are integrated into the curriculum at all levels.

In keeping with the School’s motto, “As the sowing, the reaping,” Principians are encouraged and expected to give their all in every activity—academic, athletic, artistic, social, and spiritual. Grounded in the teachings of Christian Science, we believe that every child has what it takes to excel and see our role as helping students realize their unlimited, God-given potential.

55 West Wacker, Suite 701 · Chicago, IL 60601 · Telephone (312) 750-1190 · Fax (312) 750-1193
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