I get the feeling that a good number of questions on the site from new or middling users relate to classroom assignments, and never get a good answer, because all the answers deal with real world and practical application.
I think it would help from a cleanup perspective to have a tag like classroom or assignment to identify questions and questioners that are looking for theoretical, not practical solutions to the problems they address, and help either answer the question properly, or remove the question as too localized.
EDIT: I should add the caveat that I have not noticed a huge problem on dba.se, more on other SE sites. My major concern was from a high level support standpoint I would address a question differently if it was in relation to a direct problem as opposed to a scenario one might find in a textbook.