As if you couldn't tell by schools being aired out and stores displaying more backpacks, pens and notebooks, today is the first day of school for public school students here! Mayor Bloomberg will be at Gregorio Luperon High School for Science and Mathematics in Manhattan for his final first day of school as mayor.

Education is a hot topic this year, with political candidates seizing upon concerns over test scores, achievement gaps and issues like pre-K. Did you realize it's harder to get into Harvard than NYC public pre-K? And drivers will have cause to slow down for once: There are now speed cameras in some school zones.

Here's the school calendar for 2013-2014. The NYC public school system is the largest in the country, with 1.1 million students in over 1,700 schools. And sometimes it feels like they all ride your subway line—but at least they are learning life skills.