Parent Portal
Welcome to the School Portal, a digital resource for current families! Below, you'll find public information such as the all-School calendar of events, key phone numbers and dates, athletic information, and more.
The secure portal is for parents, students, and staff.
Parent Communication
- Communications Overview
- Principia Parents Association (PPA)
- Secure Portal Access Information
- Dining Services, by Sage: Welcome | Sage Listened | Menu
Contact Information
Phone Numbers
- Principia Hotline
314.514.3000 - Sports Hotline
314.275.3580 - Switchboard
314.434.2100 - Boys' Dorm
314.275.3541
- Girls' Dorm
314.275.3544 - Afterschool Care
314.275.3579 - Campus House
314.275.3590 - Campus Security
314.514.3111
Transportation and Directions
Academic Calendar
Principia School Key Dates for 2021-2022
| Fall Semester 2021 | |
| Pre-season Training begins | Monday, Aug. 9, 2021 |
| All-Parent Opening Meeting/PPA Ice Cream Social | Sat., Aug. 14 |
| Upper School/Middle School First Day | Monday, Aug. 16 |
| Lower School First Day | Tuesday, Aug. 17 |
| Family Weekend | Oct. 8-10 |
| Fall Break (no school) | Oct. 15-18 |
| Thanksgiving Break (no school) | November 24-26 |
| US/MS/LS/PS Last day of classes | Thursday, Dec. 9 |
| Spring Semester 2022 | |
| First Day of Classes | Tuesday, Jan. 4 |
| MLK Holiday | Monday, Jan. 17 |
| Spring Break | March 12-27 |
| Classes resume | Monday, March 28 |
| Last Day of Classes for LS/MS | Thursday, May 19 |
| Last Day for US | Friday, May 20 |
| Graduation | Sunday, May 22 |
| US Sports Camps (optional) | May 23-27 |