I recently saw a coworker type out a SUM formula in Excel to get a quick total, only to delete it a second later. When I showed him a pro shortcut hidden in plain sight, he realized he'd been wasting ...

During the day, I teach Algebra I classes to high school freshmen in Springfield, Missouri. One night per week, I teach preservice elementary school teachers who serve as paraprofessionals at K-12 ...

Top students can benefit greatly by being offered the subject early. But many districts offer few Black and Latino eighth graders a chance to study it. By Troy Closson From suburbs in the Northeast to ...