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《凸透镜》(人教版自然第5册第11课)一课的教学要求是指导儿童通过实验,认识凸透镜具有聚光线、放大物体、使物体成像的作用,并通过实验培养学生寻找规律的能力。教学中,教师往住感到本课的实验内容多,教学时间不够用。难点是学生不易做好凸透镜在阳光下点燃火柴的实验和成像实验。为了解决上述问题,突破教学难点,达到教学要求,教学中可以这样做。
The teaching of “Convex Lens” (PEP 5, Vol. 11, Lesson 11) is to instruct the children through experiments to understand the function of the convex lens to condense light, magnify the object and make the object to be imaged, and train the students to find the law through experiments . Teaching, teachers live to feel the contents of the experiment more than teaching time is not enough. The difficulty is that students are not easy to do experiments and imaging experiments in which convex lenses light a match in the sun. In order to solve the above problems, break through teaching difficulties, meet the teaching requirements, teaching can do so.