Roosevelt High School Principal Michael Bradley roams the halls at a time when most students should be in class.
Here comes a student heading to the bathroom, phone in hand, earbuds pumping music.
"Psst. Psst. You can't hear me. Why not," Bradley whispers.
He closes in and taps the student, who quickly removes the earbuds and says an embarrassed "sorry."
It's one of Bradley's rules. Earbuds out. Hoods down. Hats off. No F-word.
"I want this to feel as much like church as possible, make it as formal as possible," Bradley said.
For five years, Bradley has been working to erase Roosevelt's rough reputation and make it feel as welcoming and safe as possible, a school where students come to get a rigorous and well-rounded education.
Many other school leaders in Minneapolis and across the country depend on data-driven initiatives focused on math and reading test scores to boost student achievement, but not Bradley. He aims his efforts at the humans: giving students equitable access to art, theater, strong academics and a feeling of community.