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COVID-19 Update for Prospective Students and Families:

Our admissions office is working remotely and available to prospective families, who are interested in applying for our upcoming school year. Call our admissions office at 314.434.2100 ext. 3610 or email at info@principia.edu. You should expect a response within 24 hours, usually sooner. We are ready to receive and reply to your admissions inquiries! Learn More

  1. Academics
    A
  2. Diversity
    A-
  3. Teachers
    B+
  4. College Prep
    A-
  5. Clubs & Activities
    A
  6. Sports
    A-

Applying

Application Deadline
July 15
Application Fee
$0
Interview Required
Yes
Required/Recommended Tests
TOEFL

Tuition

Yearly Tuition
$20,900
Tuition is for the highest grade offered and may have changed for the current school year. For more information, please contact the school.
Boarding (Tuition + Boarding)
$35,730
Received Financial Aid
49%
Average Financial Aid
$11,245
From Principia School

Principia is an independent, co-educational day (preschool-grade 12) and boarding college preparatory school (grades 7-12). Our beautiful 360-acre campus offers a state-of-the-art educational classroom experience as well as outstanding athletic fields and over 100 acres of outdoor teaching space where classes focus on sustainability and exploring habitats.

We welcome students from a wide range of faith backgrounds who value educational excellence and seek continuous improvement. Our aim is to better humanity by valuing global citizenship and service and embracing ethical decision making in a diverse, inclusive and equitable community based on love, joy, and respect for each other.

Principia is founded on the principles of Christian Science, a worldwide Christian denomination based on the Bible and the teachings of Jesus Christ. Students are embraced in a school community that values innate goodness and character development. Religion is not taught in the classroom.

Principia School Rankings

Niche ranks nearly 100,000 schools and districts based on statistics and millions of opinions from students and parents.

Academics

Average Graduation Rate
100%
Average SAT
1190
72 responses
Average ACT
26
19 responses

Culture & Safety

Poll
75%
of students agree that they feel safe at their school.12 responses
Poll
75%
of students agree that they like their school and feel happy there.12 responses
Poll
What are your favorite school events or traditions?
Based on 36 responses
Report
  • Ice breaker, lock in, senior retreat
    28%
  • Big Bash
    17%
  • Arts performances
    11%
  • Homecoming
    8%
  • Ice breaker, senior retreat, junior senior, lock i
    8%
  • International Dance
    8%
  • Spirit Week
    8%

    Boarding

    Students Boarding
    31%
    Boarding Days Per Week
    5-day, 7-day
    Top Countries
    Australia, Ecuador, Germany, Kenya, Nigeria
    International Boarding Students
    12%

    Students

    Diversity
    A-
    Based on racial and economic diversity and survey responses on school culture and diversity from students and parents.
    Students
    345
    46%
    of students and parents agree that students at this school are competitive.13 responses
    62%
    of students and parents agree that students at this school are creative and artsy.13 responses
    77%
    of students and parents agree that students at this school are athletic.13 responses

    Preschool

    Annual Cost
    $11,000
    Cost is for the most complete schedule offered and may have changed for the current school year. For more information, please contact the school.
    Starting Age
    3
    Pre-K Student-Teacher Ratio
    Schedule Options
    • Offers Full Week
      Yes
    • Offers Part Week
      Yes
    • Offers Full Day
      Yes
    • Offers Part Day
      Yes

    Teachers

    Student-Teacher Ratio
    6:1
    National
    17:1
    Poll
    57%
    of students and parents agree that the teachers give engaging lessons.14 responses
    Poll
    86%
    of students and parents agree that the teachers genuinely care about the students.14 responses
    Poll
    64%
    of students and parents agree that the teachers adequately lead and control the classroom.14 responses

    Clubs & Activities

    Clubs & Activities
    A
    Based on student and parent reviews of clubs and activities.
    Girls Athletic Participation
    Very High
    Boys Athletic Participation
    Very High
    50%
    of students and parents agree that there are plenty of clubs and organizations for students to get involved in.8 responses
    63%
    of students and parents agree that clubs and organizations get the funding they need.8 responses
    50%
    of students and parents agree that lots of students participate in clubs and organizations.8 responses

    Principia School Reviews

    85 reviews
    All Categories
    Wow! It's so reassuring to have Principia in our lives. With children in the Early Learning Center and Lower School, we feel connected to what our girls are learning and how to be better parents because of Principia. The children learn to think for themselves, while being compassionate. I've observed how teachers celebrate the strengths of children and ensure that racism and bullying have no place. The environment and friendships are authentic, wholesome, and kind. The campus is well situated on a very open/natural space that allows for exploration and freedom. After some distance learning last spring, our older daughter is back in class with top notch instruction from her teacher who has a Masters Degree in Elementary Education. The same standards of care and integrity that we have at home are present at school. We are daily enriched by Principia, the learning, the caring, strong sense of community, generosity of financial aid, and spiritual well-being that Principia fosters.
    Start Your Review of Principia School
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    We have had an incredible experience at Principia! Our boys are in the preschool and lower school and have loved their teachers. We've been so impressed with the dedication, love, and encouragement they receive at school. The teachers really work to foster problem solving, team work, and critical thinking skills which will prepare them for a future as a part of a global economy rather than simply focusing on facts and information.

    The focus on character education is critical to our family as well. Too much of our world seems to be focused on selfishness without consideration of people and the world around us. Prin has made a point to help our kids develop relationship building skills and to think about how events impact more than simply their small immediate world. In addition, the care that our kids receive and the close community atmosphere has made for such a safe learning environment both physically and emotionally for the kids. We couldn't be more happy with Principia!
    I have loved having my kids attend Principia for many reasons. The teachers have a genuine care and love for the students. I appreciate the forward thinking and innovation that is occurring in projects, technical skills, and inside/outside experiential learning. I appreciate the upswing in diversity among races, socio-economic levels, and ethnicity. The teachers are approachable, and you feel a real 1:1 connection with them. The school trips are phenomenal, one of my kids got to go to Costa Rica last year! The Portal system allows me to see real time results to tests and homework scores so I am never in doubt about my Upper School student. I have students at various levels and I am so grateful they are in this community. The work they are doing is keeping them engaged and is light years beyond my school experience.