About 60 teens dined and danced at the San Diego area's first prom for students with hearing impairments, where the music was especially loud and the caterers, DJ and photographer all knew American Sign Language. "Dancing is a visual form of art," said Erin Oleson, who teaches students with hearing impairments and cannot hear herself. "So by watching, many deaf people are able to pick up the moves. ... With music blaring, we are able to follow by counting. Honestly, if you can count, you can dance."