Nearly 500 teachers began their careers in the Boston Public Schools today, with the kickoff of the three-day New Teacher Institute at UMass Boston. The educators include teachers new to the profession, as well as veteran teachers coming to Boston from other school districts. Mayor Menino, School Committee Vice Chair Marchelle Raynor, Superintendent Contompasis, Boston Teachers Union President Richard Stutman and incoming Superintendent Carol Johnson welcomed the teachers in an opening ceremony. Watch video clips on New England Cable News and WBZ-TV. Photo of Dr. Johnson by Nathan Fried-Lipski, Boston Metro.