Bill Thompson, the former head of the Board of Education and son of a public school teacher, won the endorsement of the teachers union in the race for mayor. Union leaders said they were not looking to play it safe this election cycle.

"I'm there. I'm ready to work and nothing is coming through," said Sean McManamon, one of the teachers encountering delays in the city's new electronic scoring system. With teachers working overtime this weekend, education officials predict all the Regents exams will be scored by Monday.

New York City's Chief Academic Officer Shael Polakow-Suransky talks with WNYC about the trends in the high school graduation rates, and how increased standards will affect graduation numbers going forward. Listen to the full interview here.