在数学教学中,使学生加强练习,目前已为各方面所注意了。但是对怎样加强练习,看来认識还不統一。譬如,由于采用了不恰当的多练方法,过多地加重了課外练习的数量和强度,以致使学生的学习負担显著增加。这样不但不能达到提高教学质量的目的,相反地可能还会降低质量,下面就立体几何談談笔者对于加强练习問題的一些做法与体会,不当之处請同志們指教。练习应当包含两方面:一是課外练习,一是課內练习。而課內练习往往容易被人忽視,也是做起来比較困难的一环,但它却是练习中必不可少的环节,这是因为: 第一,它是加深理解和巩固所学基本知識与灵活运用基本知識的重要环节,是防止遺忘的良好办法,我們大家都有这样的体会,那就是即使教师教得很好,也还下能保証学生能全部掌握所学的內容,尤其是对 In mathematics teaching, students are encouraged to practice. At present, attention has been paid to various aspects. However, it seems that understanding of how to strengthen practice is not uniform. For example, due to the use of improperly practiced methods, the number and intensity of extra-curricular exercises have been excessively increased, which has led to a significant increase in students’ learning burden. This will not only fail to achieve the goal of improving the quality of teaching. On the contrary, it may also degrade the quality. The following is a brief introduction to the author’s practice and experience in strengthening the practice in the three-dimensional geometry. Improperly please comrades. Exercises should include two aspects: First, extra-curricular exercises and first, in-class exercises. In-class practice is often overlooked and difficult to do. However, it is an essential part of the exercise. This is because: First, it is to deepen understanding and consolidate basic knowledge and flexibility. The important part of using basic knowledge is a good way to prevent oblivion. We all have this experience, that is, even if the teacher is well-educated, it can guarantee that the students can fully grasp what they have learned, especially