Dialogic teaching harnesses the power of talk to stimulate thinking and advance learning. It is based on Vygotsky's view that learning occurs through social and cultural contexts. Effective dialog involves analyzing ideas rather than just accepting facts, with students helping each other learn through discussion and collaborative knowledge building. The key principles are that knowledge is constructed through dialogue between differing perspectives, teachers and students are fully engaged, and meanings are explored internally rather than imposed externally, leading to powerful learning and improved thinking.