My thoughts on such questions are as follows:
- I think questions about best practices (in general) are great, as long as they don't ask for a list of best practices (canonical sources could be okay, if it's clear to experts that there's a small number of canonical sources).
- I strongly oppose the creation of any "best-practices" tag because it is a "meta tag" (not to be confused with a tag on Meta, or a "Meta tag"). Jeff Atwood wrote a blog post on why meta tags are bad, and I agree with him.
- Questions on teaching students, evaluating students, and self-learning have gone either way here. Good questions on these topics include How should I study creating and programming HPC systems? and Is algorithmic analysis by flop-counting obsolete?. Bad questions on these topics have been closed (and are likely to be deleted if they haven't been already). As long as you avoid bad subjectivity (see "Good subjective, bad subjective"), questions that don't have wrong answers, and being too localized, you're probably okay.
Of course, that said, you'd have to ask the question in order for me to have some idea of whether or not it's a good fit for the site, but having asked about it on Meta beforehand means that people who pay attention to Meta are much more likely to hear you out. (And you can bitch in this post if you think your question got closed unjustly!)