The Binghamton City School District has a teacher shortage this year. Out of 60 open positions, three were still unfilled within weeks of the first day. This comes amid a national need for more teachers, and it has educators in New York feeling a bit of whiplash. A couple weeks before school started, Larry Kassan led Binghamton’s new teachers on a tour of the city. The outing is part of the district’s orientation program, and this year the buses were packed.