Why do men outperform women on the SAT? The SAT's supposed to predict college grades. Women do better in high school and they do better in college. What's the problem here? Ah, the more you use, the more you start accepting that the SAT's coachable, the more problems you have with it.

The thing about startups is you can make it, and if it's wrong you can remake it, and you can build a team that you want to have, a product that you want to have. You're utterly focused on your users or your customers and their needs, and trying to figure out how to meet those needs.

After graduation, I took a job with Manufacturers Hanover Trust in software development. I don't think I was there more than a month.

You still remember your SAT scores. And everybody else does too. Everybody's forgotten everything about themselves, everything else about high school. They remember their SAT scores.

The question was, in a sense, at Princeton Review, how much value was I adding as a public company CEO. I was adding less than other people might've... I think you want to move on when you've given your best work and then feel that you're not going to add as much value moving forward.

The Internet rewards scale; by trading higher up-front costs for lower marginal cost, market leaders can invest in better technology and service. As a result, there is nothing online that is both great in quality and small in scale. Amazon wasn't originally a better bookstore than the small shops we mourn, but it is now.

Traditionally, universities have seen size as potentially dilutive to quality. If you doubled the size of campus and faculty, most would argue that you would make it a less compelling school. However, online schools will be as good as their classroom peers only if they are large enough to afford a substantial and ongoing investment.