[k4runa]

I think this is pretty interesting, especially if you could remix courses... like if you had a bread baking playlist and a pizza making playlist. The pizza making course could include or use modules from the bread course as a requirement.

Similar with learning software development, you usually need basic modules like regex or databases before learning more complex skills.

[longerpath]

That's a great idea, kinda like the Civilization game series' "tech tree" concept. Thanks for checking out the site :)