charter school that's different than the public school? >> i think there's a number of things. it's one of the hardest things to do right now is create a great, great public school. we've been doing it for ten years at success academy. teacher development is foremost important. >> what does that mean? >> our teachers come back two weeks before the school year starts. teaching is a performance job. if you're a sports team, you need to do two weeks of spring training or more than that. you're going to get your team ready to go. >> the public school doesn't have to do that because they're union teachers and they have a whole bunch of union rules that make it pretty narrow what they can do? >> right. the union contract is pretty limiting in things school can and cannot do. for instance, for this school year teachers didn't have to be back until a day before school started. >> one of the other things that you do at your charter school that they don't do at public school, once again, it goes back to the union is you have a much longer school day.