Not Enough Talented Teachers
Many in Jewish education complain that part of "the problem" is that there are not enough talented teachers. (In an article in the forthcoming Orthodox Forum volume, I've argued that this claim is problematic. Contact me if you want more information). But we Jews are not the only ones who make this claim, and Richard Ingersoll is one person who makes it his business to actually study the claim by looking at facts rather than vague impressions. See his policy statement here, and blog comment here (BTW, Eduwonkette often makes for interesting reading). From a slightly different perspective, Education Week explains how difficult educational reform can be when the staff is not up to snuff, and what might be done to help.