Any online apps to learn history/ geography/ economics (serious stuff)?

At some point i ran into this game: http://bramus.github.io/mercator-puzzle-redux/ ...and now I'm freaked out by the fact that i know where 95% of the countries in the world are, and what their shape is.

Does anyone know such games for learning history, economics... or whatever other adult topics like that? :)

Just launched Duolingo flash cards. haven't tried yet. Not just for language other subjects too. https://tinycards.duolingo.com

For learning historical narratives, Youtube is honestly pretty great. Crash Course[1] is good for a broad overview. It presents a fairly coherent narrative and the advantage of this is that you can then relate any other historical narrative to this skeleton. Extra History[2] is a good example of a channel that presents narratives of specific incidents. If you are looking for a channel focusing on one particular period from lots of different angles, The Great War is not bad[3].

But none of this is actually going to teach you the skill of inquiry and skeptically reading different competing historical narratives. You kinda do need a class for that. A friend of mine is building a startup to make running one easier: https://www.beaglelearning.com/

[1] https://www.youtube.com/watch?v=Yocja_N5s1I&list=PLBDA2E52FB... , https://www.youtube.com/playlist?list=PL8dPuuaLjXtMwmepBjTSG... , and https://www.youtube.com/playlist?list=PL8dPuuaLjXtPNZwz5_o_5... [2] https://www.youtube.com/watch?v=EbBHk_zLTmY&index=1&list=PLh... [3] https://www.youtube.com/playlist?list=PLB2vhKMBjSxMK8YelHj6V...