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How to Improve School Culture: What Principals Get Wrong

You can't assembly your way to good culture. It's built in the 180 days between the assemblies.

Every principal wants strong school culture. Most try to build it through events: kickoff assemblies, spirit weeks, motivational speakers, PBIS rewards. And those aren't bad. But they're not culture. Culture is what happens on a random Tuesday in third period when nobody's watching.

Culture flows downhill

Here's what the research and every experienced principal knows: students don't create school culture. Adults do. The way teachers talk in the hallway, the way the front office greets visitors, the way leadership handles a crisis — that's the culture. Students just mirror it.

Which means if you want to change student culture, you start with adult culture. Not with a new behavior matrix. With the people.

What actually shifts a building

• Adults who check in. When teachers and staff have a daily practice of naming where they are, the building feels different. Less reactive, more steady. Students feel it before they can name it.
• Early signal, not just response. Principals who know how their building is doing — daily, not quarterly — can act before problems compound. Data isn't cold when it's about people you see every day.
• Consistency over intensity. One great assembly fades by Friday. A 30-second daily practice compounds all year. Culture is a daily vote, not a single event.

The principal goes first

Nothing changes culture faster than the principal modeling it. When you check in — visibly, honestly — you give every adult in the building permission to be human. That permission cascades to every classroom.

Cornelius Mosby is the founder and CEO of Super-Self Institute, working with principals on building culture from the inside out.