I'm not a scientist and don't have the depth of insight in many fields that I feel I could always accurately debunk pseudo-science. Most people aren't experts, and most kids certainly aren't. I've spent my career getting the measly amount of domain expertise I do have, and that's only in a very narrow IT field.
Rather, we need to focus on learning to better evaluate authorities. Who's the most qualified source of information? Which of several competing theories have the most qualified proponents? What incentives might they have to color what they believe?
On the web its really hard to know who's who. Mostly we have nothing better than the tone and look of the site and domain name. That's really pretty weak if you think about it! I'd definitely be interested in a system of some kind (browser extension?) that added a little more information.