PHILADELPHIA (CBS ... in the U.S. Kozyrkov is a student at the Philadelphia Performing Arts: A String Theory Charter School. On Monday, David played piano and sang songs to a crowd there.

PHILADELPHIA (CBS) -- Students at the Philadelphia Performing Arts String Theory Charter School are getting first-hand work experience in the kitchen. They are serving up warm, fresh, and flaky ...

PHILADELPHIA (WPVI) -- For 25 years, Philadelphia Performing Arts: A String Theory Charter School has presented "The Nutcracker." When they take the stage at the Miller Theater on November 20 ...