learn atcan go, and their own pace and understand what they know it don't know.lege board is the official test prep for the sat. emily: by some measure, khan academy is already one of the largest schools in the world. we view this as a huge responsibility. you can imagine kids in the village and africa who gets access to a low-cost phone or tablet device. in five or 10 years that will be everywhere. every albert einstein we found, how many of them did we not find? how many got squandered because they did not learn how to read or get a good education. imagine if we could increase by a order of magnitude by a factor of 10 number of albert einstein's in the world. the number of people back at the good alternative energy. this could be a force multiplier like we have never seen. emily: do you think videos can replace learning in the classroom? sal: if learning in the classroom is about information dissemination, videos can do that. in some ways, it is more bite sized and on demand. but i think it is a huge opportunity to allow the physical classroom to move up the va

be seen atcan also hish-profile events with wife.e was born the son of a cab driver in a poor section of boston. adelson first began in the convention business in 1979 when he founded comdex, one of the largest technology trade shows. he eventually sold that and other shows for hundreds of millions of dollars. ten years later, he bought the original las vegas sands hotel only to demolish it and replace it with the venetian. it is the first integrated resort of its kind. sound familiar? in macau, he has built another venetian almost exactly like it, but with more gaming space. this is what adelson says made him stand out among other casino tycoons. i was listening to you speak, and you mentioned you wanted to build a las vegas in macau. how come no one else saw that? sheldon: i guess that is what a visionary is made out of. betty: no, but really -- people thought you were crazy. sheldon: of course. i have been in dozens of businesses. every time i go into business, everybody thinks i am crazy. nobody wants to recognize that doing some