Last week, Udemy, an online learning marketplace, raised $50 million at a $3.32 billion valuation, up from a $2 billion valuation earlier this year. Language learning app Duolingo raised $35 million on a $2.4 billion valuation, up from a $1.65 valuation from earlier this year. The valuation bumps for both Duolingo and Udemy underscore just … Continue reading As edtech grows cash rich, some lessons for early stage