Weekdays for 18-year-old Cameron Clark start out like those of most teens. He wakes up at about 6:30 a.m., grabs a shower and some breakfast and then heads to class at Schenley High School in Shadyside, where he is a senior in the school's final graduating class.\n\nBut before hitting the books, he hits the dance floor at the Pittsburgh Ballet Theatre headquarters at 2900 Liberty Ave. in the Strip District, where he is a full-time student in the PBT School's pre-professional program. After a technique class, it is off to high school until early afternoon.