With many programming languages, you have the opportunity of practicing the language by doing problems or developing programs that will do certain things. With LaTeX, however, you can't exactly do that because it is a typesetting language and therefore, requires some sort of material to be practiced with. I understand there is the lipsum package but what are somethings that a person can do to practice their LaTeX skills without having the need for material? For example, practice for building various tables, practice for doing tricky math equations etc.