在课堂上学生是学习的主体,要引导学生积极主动地探索建构知识已越来越成为广大一线教师的基本观念。课堂上,由教师单向灌输知识的现象少了,而通过简单提问将书本知识传授给学生的现象普遍存在。教师的引导,大多是将学生的思维纳入预设的轨道,学生的动手实践,只 In the classroom, students are the main body of study. To guide students to actively explore the construction of knowledge has increasingly become the basic concept of the majority of front-line teachers. In class, the phenomenon of one-way instilling of knowledge by teachers is less, and it is common for students to pass on their knowledge of books through simple questions. Teacher’s guidance, most of them are students’ thinking into the preset track, the student hands-on practice, only