一、背景描述近段时间我们中职校一直提倡文化课要为专业服务。我们学校也因此进行了一系列的以专业为核心引领的教学改革。我是在邮电部任教。因此我们的数学改革也应该围绕通信这块内容服务方向改革。本课题是在学习了函数的图象和性质的基础上,进行的一节探究式的课堂教学。学习了函数及分段函数后,学生对函 First, the background description Recently, our secondary vocational schools have always advocated cultural courses for professional services. As a result, our school has conducted a series of teaching reforms led by professionals. I am teaching at the Ministry of Posts and Telecommunications. Therefore, our mathematical reform should also focus on the content of communication services reform. This topic is based on the study of the image and nature of the function, based on a section of inquiry-based classroom teaching. After learning the function and segmentation function, the student correspondence