Cognitive Rigor in Lesson Planning: Where Bloom’s Taxonomy and Webb’s DOK Meet
When educators examine the rigor of an activity or when they look for ways to introduce rigor into their lesson plans, they often consult one of two models: Bloom’s Taxonomy—originally developed by educational psychologist Benjamin Bloom in 1956—or Webb’s Depth of Knowledge (DOK)—developed in 1991 by Norman L. Webb, a senior research scientist at the Wisconsin Center for Education Research. But because Bloom’s Taxonomy is so prevalent and well-known, most educators will begin and end their lesson planning with Bloom’s model alone.