Leanna Pitsoulakis took a lap around her freshmen honors math class at Carl Sandburg High School, scanning the work spread across each student’s desk before returning to the front of the room with a ...

Once a century, a very special day comes along. That day is today — 9/16/25. Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.

Toward the end of a math lesson on a sunny Friday in October, fourth-grade teacher D’Atra Howard and math instructional coach LaVeda Gray ducked out of the classroom to huddle. Howard’s students at ...