DOK, or Depth of Knowledge, is a term used in education to describe the complexity level of a task or question. Synonyms for DOK include cognitive rigor, intellectual challenge, depth, and complexity. Other terms that can be used to describe DOK include difficulty, sophistication, intricacy, and intricateness. It is important to understand the level of DOK required for a task to ensure students are challenged appropriately and demonstrate true mastery of a concept. Teachers can use a variety of strategies to increase the level of DOK in their instruction, including encouraging critical thinking, using open-ended questions, and providing opportunities for problem-solving.