Long before his iconic acting career, which includes roles in “Taxi” and “Who’s The Boss,” Tony Danza received a degree in History Education. During the 2009-2010 school year, he took on his most challenging and rewarding role yet as he stepped into the classroom as a full-time teacher at Philadelphia’s Northeast High School. “Teach: Tony Danza” follows the first year-teacher as he instructs a 10th-grade English class with 26 students.