What is the DOK and Why Do We Need It?
The Depth-of-knowledge (DOK) was created by Norman Webb from the Wisconsin Center for Education Research.
The Depth of Knowledge is the degree of depth or complexity of knowledge standards and assessments require; this criterion is met if the assessment is as demanding cognitively as the expectations standards are set for students.
Completely aligned standards and assessments requires an assessment system designed to measure in some way the full range of cognitive complexity within each specified content standard. Norman Webb identified four levels for assessing the DOK of content standards and assessment items.
The DOK levels are Recall (Level 1), Skill or Concept (Level 2), Strategic Thinking (Level 3) and Extended Thinking (Level 4). Of course to accurately evaluate the DOK level, each level needs to be defined and examples given of types of student behaviors.
DOK implies the interaction of how deeply a student needs to understand the content with different ways of responding and interacting with the content.