“‘Justin,’ yelled the ballet master Patrice Hemsworth. ‘Move your arms. Good, good, good. Boys, you look beautiful. Go girls. Use your shoulders.’ She watched silently for another few beats and then, as the recorded music stopped, yelled out: ‘The feet were good but, the arms have to work with it. And you’re rushing like crazy.'” A reporter visits Ballet Tech, a city academy for middle- and high-schoolers founded by choreographer Eliot Feld.