Students at the Stevan Grebel Center for Dance become metaphorical cousins of such legends as Mikhail Baryshnikov and Rudolf Nureyev. That's because Stevan Grebel, like those shining stars, was taught by none other Alexander Pushkin, the headmaster of the Leningrad Choreographic School from the 1940s through the 1960s. But Grebel goes beyond the ancient dance form?and even beyond the stage itself. Students ages 3 and older can sign up not only for jazz, tap, lyrical, and hip-hop dance classes, but also for supplementary programs that cover forms of creative motion such as ice skating, cheering, gymnastics, and yoga. Classes are grounded in the Vaganova ballet technique, a melding of the graceful French style and the more athletic Italian school.