This week, the EdSurge On Air podcast features three "Extra" editions focusing on investors: how they choose what to invest it, where the money is flowing, what personalization in schools means to them, and more.

On this episode, we speak to Brigette Lau of Social Capital. Brigette shares how her organization, Social Capital, measures and evaluates the health of the companies that she invests in, as well as the reality of free/freemium business models. Does she believe free products will work out in the long run?