Set induction refers to the steps a teacher takes at the beginning of a lesson to introduce the topic and engage students. This includes gaining students' attention, motivating them about the lesson, and linking the new material to prior knowledge. Good set induction strategies include getting students' attention, sparking their interest, putting the lesson in context, and using advance organizers. Examples of attention-getting and interest-building techniques include asking thought-provoking questions, showing objects, and giving demonstrations. Putting the lesson in context can involve assessing prior knowledge through questions or reviewing past lessons. Advance organizers provide a framework like a mind map or story. An effective set induction should be brief, engaging, and directly relate to the upcoming lesson.