A nice argument for how common core will require a major change, but how we should also be careful not to cut back too much on non-expository texts. Yes to all of that. Excerpt: 

“Argument and exposition are important skills, but they build upon and incorporate the richness of the narratives that give most children their first opportunities to write (and talk) at length.

In the current enthusiasm for expository text, we need to be sure we don’t cut the roots of the very skills we are trying to nourish. When we look at the end goals of education, the achievements in reading, writing, and language that are outlined in the Common Core are not a curriculum, but rather the kinds of oral and written language skills that students should be engaging as they explore issues that matter in literature and in life. And when students do this as a matter of course, we will have the real writing revolution.”