Do you think you could tell a good skateboarding trick from a great one? The difference between a perfect ollie and a poor one? Do you even know what an ollie is? With skateboarding coming to the Olympics for the first time, it’s about time to learn (or freshen up) on your knowledge of the sport. With our guide, you’ll know how to watch the skateboarding events like an Olympic judge.
Tony Chow is a video producer for FiveThirtyEight. @tonyhkchow