Complex sentence: Binghamton High School was one of the first schools in New York to offer the International Baccalaureate (IB) Diploma, and is still one of only two schools in the area to offer students this opportunity.
Split into simpler sentences: Binghamton High School was one of the first schools in New York to offer the International Baccalaureate (IB) Diploma. To this day, it is one of only two schools in it's region to offer students this opportunity.