教师、学生,是教学活动的重要组成“部件”.教师与学生之间的沟通交流,能够实现教师主导特性和学生主体作用的“呈现”和“发挥”.构建主义认为,教学活动是师生之间借助课堂媒介进行双边互动的过程,互动性是教学活动的显著特性之一.教师和学生之间在互动性教学实践活动进程中,主导特性能够得到有效运用,主体特性能够实现有效培养.新实施的初中物理课程纲要明确指出:“教学过程是师生交往、共同发展的互动过程,要建立良好的师生、同伴关系,让学习主体在互动交流进程中感到温暖、心情愉快,形成安全感、信赖感.”在初中物理学科教学中,教师经常就某一知识点或问题案例,通过开展多样性、有效性教学手段,组织学生开展互动交流活动,切实、深入的解决问题或 Teachers and students are the important components of teaching activities “components ”, the communication and exchange between teachers and students, “presentation ” and “play ”, which can achieve the teachers’ , Teaching activities are the process of teachers and students interacting with each other through classroom media, and interactiveness is one of the salient features of teaching activities.During the process of interactive teaching and practice activities, the dominant characteristics of teachers and students can be effectively used, Characteristics can be effectively cultivated.New implementation of junior high school physics curriculum outline clearly states: “teaching process is interaction between teachers and students, mutual development, to establish a good teacher-student relationship, so that the main learning process in the process of interaction and exchange Warmth, a pleasant mood, a sense of security and trust. ”In the teaching of physics in junior high schools, teachers often organize students to carry out interactive activities on a certain knowledge point or case by practicing diversity and effective teaching methods To solve the problem in depth