we have this big moment in the moment is that fourth 35 years of my teaching career i walked into the classroom having no idea if the kids had done the homework or how how uh what their commitment was to the subject and then suddenly there's this coaching platform on khan academy that was a total game changer for me i wasn't imagining that the khan academy calculus content would become uh a what a big part of our curriculum i imagined frankly and wrongly that we'd use these exercises suggest kids use it for review and it when we discovered the coaching platform and how powerful that was um a group of us uh said let's give it a go let's try using khan academy as a major part of our curriculum and my goodness it changed the way i teach for instance five minutes before i walk into class i can go to the platform and i can look through my list of students to discover that all the two of them had done the homework had watched the videos had cleared the you know had cleared the hurdle if you will of the exercises that i had given them so when i walked in the room i didn't have to go over homework anymore that was liberating um and so if there were two students who didn't do the homework it gave me the opportunity to pull them aside and say hey i see you didn't get to it or i see you struggled with it is there a way that uh that you and i can meet later today it's because i don't want you to get behind in this and the first 15 minutes of class now all of a sudden we're breaking new ground we're doing harder problems and uh the kids responded so well to it because i think they had years and years and years of math teachers going over the homework for the first 15 minutes of class and the poor kids must have been bored to death or why bother doing the homework because he'll do it on the board anyway so that was just totally liberating um and uh gave me an opportunity to really think hard about teaching since we started using khan academy the one thing that uh we can't help but notice is that we're having more kids uh make it to the end of bc calculus and it's clear to me that we're having uh more girls and more underrepresented kids finish our bc calculus class than we ever did before and i gotta believe it's our new way about thinking about teaching and using khan academy in the classroom and for homework assignments has got to be a big part of that