Sports Illustrated or Scientific American or Stephen King will serve as well as Shakespeare. The only requirement is that there be a lot of it, and that it be self-motivated. For reading to produce writing competence, it must be transparent. The reader must be paying attention not to the words and sentences themselves, but to what they say. Performance What teaching or training can do is take readers who already have competence and give them a second ability, performance.
Performance is the ability to actually produce language.
Performance always lags behind competence. Almost any child who grows up in a family of English speakers will soon learn to translate his or her competence into spoken performance. But performance in writing is much more difficult to achieve. And that's where teaching and training come in. For adults, training can give those who already have competence in written English three important components of performance.