In order for adolescents to move from being novices to experts in specific content area practices, an expert practioner (the subject matter teacher) guides, models, makes explicit, and supports the novice in his or her developement. Indeed, because ways of thinking, speaking, reading, and writing vary from discipline to discipline, some believe the most appropriate place for students to learn these discipline-specific discourse practices is from teachers who are already experts in these fields.
Uh, in other words, people who know something about a subject it teach it better? And kids can learn from this? Wow. This ole world is a damn sight more mysterious ma and pa told me it was.
(That was from an article designed to teach people how to interest kids in reading.)