本课是在指导学生寻找声音,理解声音是由于物体振动产生的基础上,引导学生认识物体传声这一现象。闫老师把本课教学的重点放在学生的探究上,她想让学生通过小组合作对身边一些熟悉的物体进行探究,从而知道声音可以通过气体、液体、固体传播。为了帮助学生探究,闫老师为学生准备 This lesson is to guide students to find the sound, understanding the sound is due to the vibration generated by the object, to guide students to understand the object sound transmission of this phenomenon. Teacher Yan put the emphasis of this lesson on student inquiry. She wanted students to explore some familiar objects around by teamwork, so as to know that the sound can be transmitted through gas, liquid and solid. To help students explore, Yan teacher prepares for the students