The Challenge of Challenging Text.
Timothy Shanahan, Douglas Fisher, Nancy Frey · Educational leadership · 2012
This is in contrast to most past discussion of this topic, which emphasized how overly complex text may impede learning. Such discussion therefore focused on developing various readability schemes and text gradients to help teachers determine which books might be too hard for their students. The new standards instead propose that teachers move students purposefully through increasingly complex text to build skill and stamina.