or not you're talking about bad teachers or charter schools or things like that, no one tolerates bad teachers. no one wants to. and our union is taking some concrete steps to do something about that. but we have to all work together. i heard a story yesterday that broke my heart. someone got up and said that a teacher taught two days a week and the principal said the tenure system stopped them from firing that teacher. that's wrong. that's not what tenure is. it's a due process system. ultimately managers have to manage, teachers have to teach. but we need to have for teachers the preparation for them to do their jobs. let's look at what happens in places like finland that outpace us. they spend much more time investing in teachers before they come into teaching like we invest in doctors here. but when we get into school, we have to help teachers become good teachers. we have to have new evaluation systems that focus on continuous improvement and then evaluate teachers. >> all right. i want to ask you to break down a little bit of that. one of the things you mentioned was about the concern about