<p>I say yay to allowing <em>specifically pedagogical</em> questions to be on topic. To support my support:</p>

<ul>
<li>I don't believe it is much of a stretch that similar examples currently exist on the site. See, for instance, <a href="https://stats.stackexchange.com/q/18082/1036">How would you explain the difference between correlation and covariance?</a> As Macro said in comments as well, having a <a href="https://stats.stackexchange.com/questions/tagged/teaching" class="post-tag" title="show questions tagged &#39;teaching&#39;" rel="tag">teaching</a> tag gives further evidence of precedents on the site.</li>
<li>We are in essence trying to teach every time we write an answer. A goal we should all strive for is to present the information in an accessible manner. This is just slightly more specific in that it is asking how to present a concept to a very specific intended audience (which is a good thing!)</li>
<li>Such topics could have widespread use for the community. Many of the members of the forum teach to a wide variety of audiences. This includes not only students in the class room, but also people who have paid us as consultants and people who read our reports.</li>
</ul>

<p>You can make any topic overly broad or unanswerable by asking a vague question, but I don't see why this is any more problematic for these types of questions than any others. The usual rules apply to these questions in that the scope should be well defined. The site's usual mechanisms to deal with this should be sufficient, and as long as the question is well thought out I highly doubt it will be problematic.</p>
