it was from ann doerr. i immediately e-mailed her -- it was a $10,000 donation. said thank you so much, this is the most generous donation the khan academy has ever received. if we were a physical school, you would now have a building named after you. and she responded back. she said, well, i love what you're doing. i would love to learn more. and, you know, we met and we talked more. she said you have made a lot of progress, but how are supporting yourself? and in as proud a way as possible, i said i'm not. she said you really need to be supporting yourself, i've just wired you $100,000. so, that was a good day. emily: wow. sal: that was what kind of allowed me to say, wow, maybe i can really do this. emily: and it is still all free. sal: it's all free. free world-class education for anyone, anywhere. that is core to who we are. we have support from the gates foundation, from google, from others to turn into a real organization. it is not just me anymore, to be clear. we're 80 full-time employees. we have volunteers. it's really a much larger effort than me. emi