主持人按：说课活动使教师把对教育教学理论的学习与现实的课堂教学结合起来，以现代教学论和学习心理学为依据，紧密围绕优化课堂教育过程设计来说教法，说学法．因此，说课是近年来各地教研部门十分推崇的一项活动，本栏也愿为老师们交流优秀的说课作品提供一席之地．本期推? The host presses: The class activity enables the teacher to combine the study of education and teaching theory with the actual classroom teaching. It is based on modern teaching theory and learning psychology. It closely focuses on optimizing the design of classroom education process. Therefore, class teaching is an activity highly praised by teaching and research departments in various places in recent years. This column is also willing to provide a place for teachers to exchange excellent lectures. Push this period?