LEARN ABOUT LEARN: Education globetrotter Tom Vander Ark recently shared how Learn Capital (where he is a partner) makes sense of the chaos in the education market to pick its investments. Its portfolio currently lists 41 companies--and word on the street is it's close to closing a new fund. Here's how they organize the market into eight "functional categories" and the 10 outstanding "K-12 impact opportunities" available thanks to the growing accessibility of cheap devices and broadband. (Subscription required.)