Of the many skills leaders need to be effective, research consistently shows that complex problem solving is paramount. For most of us, however, solving difficult problems and selling the solutions ...

Here's the thing about math that nobody tells you: it's less about memorizing formulas and more about knowing which tools to reach for. By fourteen, students should have a problem-solving toolkit that ...

If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...