Teachers are particularly beset by the temptation to tell what they know.

Teachers … are particularly beset by the temptation to tell what they know. … Yet no amount of information, whether of theory or fact, in itself improves insight and judgment or increases ability to act wisely.

—Charles Gragg, “Because Wisdom Can’t be Told,” 1940. In Wiggins, Grant; McTighe, Jay. Understanding by Design (Expanded Second Edition). Alexandria, VA, USA: Association for Supervision & Curriculum Development, 2005. p 227. Retrieved from http://site.ebrary.com/lib/westernoregon/Doc?id=10081770&ppg=239