i'm racquel dylan and i would like to say a special thanks to miss sara and how her heart was -- continue on. [applause] >> thank you. they put up with me for a long time so i'm very grateful to them. they have very busy lives and were very gracious about making time for me again and again so this book would not have been possible without them. >> congratulations, sara. -- sarah, and i would challenge you to not consider yourself a teacher or good teacher, because having red the book there are multiple ways to convey ideas and have them installed in our lives, so congratulations. >> thank you. >> and i just want to talk to you a little bit one of the things in the book, around expulsion and suspension and you have paul tuft's book, talking about noncognitive variables and their importance on achievement. can you talk about the role of a curriculum and either in terms of how limited it is here or what it should be in terms of addressing all the needs of a child of significant needs of children. >> sure. i do think the way that the landscape of schools has evolved here over time -- and not