The document discusses classroom discussion and its benefits and limitations. It defines discussion as the exchange of ideas between students and teachers. Some advantages of discussion are that it can be interesting, challenging, inclusive, allow for new ideas, and help students internalize lessons. Potential limitations include potential for limited participation, lack of challenge, difficulty level, and issues with age-appropriateness. The document also suggests ways to integrate discussion, such as introducing new topics, using it after presentations, and to evaluate instruction effectiveness.