if I went to ask what are some of the sources of education where a person get knowledge from, how can I say this in a more formal way? I'm not native native English speaker, still learning so I still don't know what are the proper words in this case.
The phase is:
What are some other sources of education that you have done?
so possible answers would be: "I taught myself since age X", "online courses", "I participated of K community" and so on. I'd like to replace "that you have done" by something more formal but feel free to rewrite the whole phase, if you want to do so. Any help is appreciated.