The document discusses the importance of activating students' prior knowledge before reading or listening to new information. It defines prior knowledge as a student's existing concepts and experiences about the world and topics. Activating this prior knowledge helps students make connections and increases their comprehension. Some ways to check students' prior knowledge include brainstorming, asking questions, or presenting a problem/scenario related to the topic. The document also categorizes different types of questions teachers can use, such as memory, convergent thinking, divergent thinking, and evaluative thinking questions.