I'm having trouble expressing myself clearly about this issue, so please ask me to elaborate (or perhaps someone has better words than I).
This question about how to effectively teach mathematics to a child is a good example of a question for which I am conflicted about casting a close vote. I think the best way to phrase my question is as follows:
Are close votes used to enforce a prescribed notion of what questions are to be featured on the site, or are they intended to naturally create the environment desired by the users?
Certainly, this question is not constructive in the strict sense that it will not admit a definitive answer. Still, I feel the question is a good faith effort by a new user and could easily be reworded as a "reference request" about teaching children. My dilemma is this: Do I cast a vote to close because I don't believe it is the kind of question normally welcomed by the community, or should I leave it be and wait for five users who have a stronger personal feeling that the question does not belong? Of course, five such users might not exist, and then the question remains open. Is this the desired outcome?