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凸透镜成像原理复杂,实验设计和操作难度大,成像规律的归纳超出学生原有认知水平.教师在教学设计时应吃透教材意图、优化实验方案,让学生经历真正经历探究过程,领悟探究方法,体验探究乐趣.一、当前凸透镜实验教学的困境1.受当前功利教育主义的影响,教师只注重知识与技能目标,形成了由教师包办说出规律,学生通过口诀理解记忆的错误教学模式,忽略了三维目标之间的内在联系.2.学生难以区分物距、像距和焦距等物理概念,不知道实验
The imaging principle of convex lens is complicated, the experimental design and operation are difficult, and the imaging rules are summarized beyond the original cognitive level of the students.Teachers should thoroughly understand the teaching material in teaching design and optimize the experimental program, so that students can experience the real inquiry process, Experience the fun of exploration I. The predicament of the current convex lens experimental teaching 1. Affected by the current utilitarian education, teachers only focus on knowledge and skills goals, formed by the teachers arranged to say the law, the students use the formulas to understand the mistaken teaching mode, ignoring The inner relationship between the three-dimensional goals.2 students difficult to distinguish between physical distance, distance and focal length and other physical concepts, do not know the experiment