If you're old and aren't familiar with what "Kahoot" is, it's a user-generated educational quiz game played by students all over the world. Once a student creates a quiz, aka a "Kahoot," it generates a pin number that others can enter into their computers or mobile devices in order to join in. A trivia question with four multiple-choice answers pops up on a communal screen and players can pick their answer.
As you can probably guess, students go nuts over this game - probably because it's a hell of a lot more interesting than sitting in class listening to a boring-ass teacher talk for an hour!