Last week, we reported that popular language learning app Duolingo, with 500 million total app downloads, was raising $35 million on a valuation of at least $2.21 billion — the latest chapter in what has become a long book on how e-learning and other education startups are raking in big audiences and significant funding, a byproduct of the Covid-19 pandemic driving more people indoors and on to screens for all of their interactions. (Fittingly, Duolingo’s details were part of a bigger scoop on how another edtech startup, Udemy, was looking…
