The document discusses different levels and types of questions that instructors can use when teaching. It describes Bloom's Taxonomy, which organizes thinking skills from lower to higher levels, including knowledge, comprehension, application, analysis, synthesis, and evaluation. Lower-level questions focus on remembering and understanding material, while higher-level questions encourage more critical thinking. The document also distinguishes between closed questions that have a limited set of answers and open questions that allow for more varied responses. Instructors are advised to vary their questioning techniques within a lesson to check students' understanding at different cognitive levels.