一、教学案情前不久,笔者听了一位年轻教师的新授课,内容是苏科版八年级上册第四章第一节“光的折射”.本节内容探究性强,与生活联系密切.在导入课题进行光从空气射入水中的折射探究时,这位教师设计了如下教学过程:师:你们去过河边吗?生:(齐声)去过.师:那么,你们在河岸上看到的 1. Not long before the teaching case was written, the author listened to a new lecture by a young teacher. The content was the refraction of light in the fourth chapter of the Sukho edition of the eighth grade. This section was highly inquiring and closely related to life. When the subject was introduced into the study of the refraction of light from the air into the water, the teacher designed the following teaching process: Teacher: Have you been to the river? Student: (in unison) been there. Teacher: Well, you are on the banks of the river. have witnessed