During university I gave additional lessons for lower semesters and at times had to juggle three languages: Java, Typescript and plain JavaScript for that one professor who thought TS sucks.

Coding on the spot got really messy at times.

Which alternatives do you recommend?

Since 2013 then, yes.

Look at this normie…

Only EVE players understand! /s

7o

*furiously waves book around*

The Chaos Computer Club Initiative Chaos macht Schule might be able to help you with some materials and guidance.

Wikipedia

TL;DR: A permissive license allows doing almost everything, including turning the code into proprietary products.

Thank you!

Can’t find the comic at the moment, but it immediately came to my mind:

• Dude holds a purple flag
• Sees guy with a yellow flag greeting him
• Looks at his flag
• Thinks “Fuck that guy”

People can hate each other for any reason imaginable. Looking differently is just the simplest one.

Also, there is this (German) collection of online shops sorted by categories.