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在小学数学课堂教学中,教师在教好课本的基础上将课本知识适当向课外延伸、扩展,不但能扩展学生视野,启迪学生思维,而且对培养学生举一反三,解决实际问题的能力和创新意识有着重要的作用。正如叶圣陶先生所说:“教材无非是例子,凭这个例子要使学生能够举一反三。”但是,笔者最近在调研听课中发现,绝大多数教师不会甚至不知将课本知识向课外延伸,缺乏甚至没有延伸意识,在课堂教学中只会照本宜科,书上有什么内容就讲什么内客,书上讲到哪一步教师也就只教到那一步,受课本束缚太大,不敢越“雷池”(课本)一步。结果教的太死,太呆板,学生解题能力不强,课堂教学效果大打折扣。例如:
In the elementary mathematics classroom teaching, the teacher, on the basis of teaching a good textbook, appropriately extends and expands the knowledge of the textbook out of class, which not only expands students ’horizons and inspires students’ thinking, but also has the ability and ability to innovate in solving practical problems Important role. As Mr. Ye Shengtao said: “teaching material is nothing more than an example, with this example to enable students to compare.In addition, the author recently found in the survey, the vast majority of teachers do not even know the textbook knowledge to extra-curricular, the lack of Even without awareness of extension, in the classroom teaching will only take this book Yikeke, what is the content of the book to talk about what is inside the guest, the teacher said at what step the teacher also just taught that step, bound by the textbook too much, not the The more ”thunder pool " (textbook) one step. The results of teaching too dead, too stiff, students are not strong problem-solving skills, greatly reduced the effectiveness of classroom teaching. E.g: