Pictures

If you follow Principia News, you are no stranger to stories about the Principia Solar Car team. You've seen them on the American Solar Challenge podium, you've seen them driving around campus, and you've seen evidence of their prowess in harnessing the sun's rays to power eleven generations of solar ...

The hill prairies found along the bluffs overlooking the Mississippi River represent a significant portion of the last remaining prairies in Illinois. These prairies maintain a foothold on the south-facing bluffs because the dry conditions there favor grassland species. The steady encroachment of trees and shrubs, however, threatens the prairies’ ...

Enjoy this photo slideshow from the May 22, 2022, Upper School graduation ceremony!

Enjoy these images of fall semester 2021. From Preschool to Upper School, it has been a time to remember—filled with joy, learning, and overcoming challenges. This slideshow includes photos of Principia School students at various Christmas programs, science projects, clubs, field trips, and other events.

This spring, the St. Louis chapter of the American Chemical Society gave its annual High School Chemistry Teaching Award to Upper School chemistry teacher Melanie Shedd (C'98) for her achievements and innovation in science education. Shedd also serves as the School’s K–12 science curriculum coordinator.

This highly regarded award ...

Get an inside look at the most recent Summer Session—see classes, performances, activities, and lots of smiles! Next year's Summer Session takes place June 6–20, 2020.

Enjoy a peek at a fall semester filled with engaged learning, athletic achievement, artistic expression, and heartfelt friendship.

From classes to character trips, sports competitions to community events, School students are happily engaged in a range of fall semester activities.

We’re launching the 2018–19 academic year. Take a peek at classes, clubs, athletics, and a study abroad.