Emphasizing lecture as the core form of teaching and research activities has a significant impact on teachers' teaching design, implementation, and evaluation. By delivering lectures, teachers can comprehensively examine teaching issues, analyze challenges in depth, and objectively evaluate teaching effectiveness. Lesson presentation is not only a part of teaching and research activities, but also an intermediary for teachers' learning and development. The article points out that as a discourse communication behavior, lesson telling has clear purposes, methods, and effects, and further research is needed to clarify its application forms and evaluation criteria under different teaching and research purposes. Despite having rich experience and guidance in lesson presentation, there is still a relative lack of systematic research from the perspective of discourse communication. This column aims to provide new perspectives and reflections through four special articles, and promote in-depth exploration of teaching practice.