课堂是流动的生命。教师不能只执行教材,而应根据学生现有知识基础,灵活地、创造性地处理教材,并在课堂实施中根据学生情况,灵活地调整生成新的教学资源,使课堂处于不断的动态变化之中,使课堂充满生机和活力。〔片断一〕师:刚才我们认识了长方体的面、棱、顶点,现在你们每人手 Classroom is a flowing life. Teachers should not only execute teaching materials but should flexibly and creatively handle the teaching materials according to the existing knowledge base of students and flexibly adjust and generate new teaching resources during the implementation of the classroom so as to keep the classroom in constant dynamic changes , So that the classroom full of vitality and vitality. [Piece a] division: just now we know the cuboid face, edge, vertex, now you each hand