A skateboarding principal offers unusual incentives to his students to motivate them to learn more.

Elena wants to ride her bike. She steadies, she readies. She wobbles, she bobbles . . . KA-BANG! Learning to ride a bike is hard. But Elena can do it. She just has to try, try again.

Nigel loves swimming. The water is his favorite place to be, and he comes from a long line of swimming champions. His mother is the fastest swimmer in crocodile history, and his sister was the first crocodile to get a perfect diving score. But Nigel doesn't like competitions. His heart hammers when the whistle blows, and his tail trembles when he hears the shouting from the sidelines. But he doesn't want to disappoint his family, so he never tells...