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课堂教学的“学”和课堂教学的“练”是小学数学教学的一个重要组成部分,无论是新授课还是练习、综合复习课都离不开学与练。如何在《图形与几何》的教学中体现学练结合的有效性呢?我从以下几方面展开探讨。一、课堂教学的“学”和课堂教学的“练”要有针对性在课堂教学中对于学生很难理解的关键之处要重点花时间进行重点讲解,在学生理解之后,要有针对性地练习,而不能平均使用力气,否则只能起到事功半倍的作用。例如,在教学五年级数学上册《组合图形求面积》时,我第一轮上这节课时,没有向学生交代什么是分割法和添补法,我只是将例题照本宣科地给学生讲完了,从作业上反映出来的问题是只有部分学生只会列式计算,从组合图形上看没有反映出是通过分割法还是通过添补法来求组合图形的面积,而且每一步求的是什么学生也说不清楚。第二轮上这节课时,我重点讲清了什么是分割法和什么是添补法,课堂
Classroom teaching “learning ” and classroom teaching “practice ” is an important part of primary school mathematics teaching, whether it is a new teaching or practice, comprehensive review classes are inseparable from the school and practice. How to reflect the effectiveness of the combination of study and practice in the teaching of “Graphics and Geometry”? I will discuss the following aspects. First, the classroom teaching “learning ” and classroom teaching “practice ” should be targeted in the classroom teaching for students to understand the key points to focus on the time to focus on explaining, after the students understand, to Targeted practice, but can not use the average strength, or only play a role in half the work. For example, in the fifth grade mathematics book, “Combining Graphic Seeking Area”, I did not explain to students the division method and the addition method in the first round of this class. I just finished the example to the students according to the instructions, Reflected on the problem is only part of the students will only calculate the column, the combination of graphics does not reflect the division by law or by adding the law to seek the area of the combination of graphics, and what is the demand for each step is not clear . The second round of this class, I focused on what is the division method and what is Tim Complement, classroom