thank you very much. >> thank you. >> thank you very much. >> andrew iden, nate powell, and of coursejohn lewis. the book is called "march: book one." there will be three of these. it's hard to find, because it is selling so well, but that's a good sign. we'll be right back. with a mission of providing a free world-class education for anyone, anywhere. if you look at a khan academy video, they cover everything from basic arithmetic to calculus, trigonometry, finance. you can really just get what you need at your own pace. and so, bank of america came and reached out to us and said, "we are really interested in making sure that everyone really understands personal finance." we're like, "well, we're already doing that." and so it was kind of a perfect match. i don't do any cleaning. i make dirt. ♪ very, very heavy. i'm not big enough or strong enough for this. there should be some way to make it easier. [ doorbell rings ] [ morty ] here's a box, babe. open it up. oh my goodness! what is a wetjet? some kind of a mopping device. there's a lot of dirt on here. morty, look at how easy it is