“In Ashley Tuttle’s increasingly popular ballet classes, actual dancing is encouraged — something that’s less common than you might expect. Ballet class is usually a place to hone an impossible technique, and dancing is for the stage. But Ms. Tuttle doesn’t subscribe to that notion; what’s startling about her classes is the freedom she pulls out of her students. She cares deeply about technique, but for her, ballet is about more than positions; by the end, even beginners find themselves linking academic steps into swirling dancing phrases.”