By regularly working in activities that get students to recall content they’ve learned in the past and apply it, teachers can ensure deeper understanding.

In business, numbers usually show up in boardrooms as balance sheets, profit margins and quarterly earnings. They tell us whether the organization is winning or losing, thriving or barely keeping the ...

A grid of “91s” hides a single “19” that’s trickier to find than you’d expect. Can you spot it in 7 seconds? This brain-teasing puzzle tests sharp observation.