《数学课程标准》中指出:数学教学活动中教师要激发学生的积极性,给学生充分从事数学的机会,为学生的终身学习打好坚实的基础。而真正生动有趣的课堂,是新课程改革所倡导的,也是学生所追求的,在“自主学习”教学模式的引领下,以情境引入,提出问题,自主探究,合作交流,提示规律,解决问题,评价反馈,总结提升为主要环节,通过教师激励引志,师生共同参与,使学生在观察中看到真实,在猜想中体味奇妙,在推理中享受乐 According to “Mathematics Curriculum Standard”, teachers in mathematics teaching activities should stimulate the enthusiasm of students, give them full opportunities in mathematics and lay a solid foundation for students’ lifelong learning. The real vivid and interesting classroom is advocated by the new curriculum reform as well as pursued by the students. Under the guidance of the “autonomous learning ” teaching mode, the classroom is introduced with context, asking questions, exploring independently, cooperating and exchanging, prompting the law, Solve problems, evaluate feedback, and summarize and promote as the main links. Through teachers’ motivation and guidance, teachers and students can participate together so that students can see reality in observation, wonder in conception, enjoy music in reasoning