Panel discussions involve a small group of experts discussing a topic in front of an audience. They originated in 1929 as a way to have small group discussions with a larger audience. The objectives are to provide information on a topic from different perspectives, analyze problems, identify values, and provide mental recreation. There are two main types - public panels which discuss common issues, and educational panels which provide knowledge in educational settings. An effective panel includes an instructor to plan it, a moderator to guide discussion, panelists with expertise, and an audience to ask questions.