khanacademy
Sal dives into Bill Gates's energy equation from this year's @GatesFoundation letter: https://t.co/eBkROizd0C http://pic.twitter.com/3kaThYbGXd
— Khan Academy (@khanacademy) February 23, 2016
Is It Just Me, Or Does Duolingo Not Work?
Is It Just Me, Or Does Duolingo Not Work? Here is what I remember from my months of Duolingo French studies: "une pomme." An apple. January 26, 2019 at 02:12PM via Digg http://bit.ly/2RfwWTE
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