Peer Instruction is an evidence-based, interactive teaching method developed by Harvard Professor, Eric Mazur in the 1990's. Faculty gather information before and during class to ascertain what students do or do not collectively understand and provide opportunities for students to engage in discussions of reasoning and epistemology. In this method, students individually answer a question that addresses fundamental concepts (usually with iClickers). After responses are collected, students then discuss the question with their neighbors and answer again.