数学课以练习为主线,使整个课堂处处存在参与竞争的机会,为学生自我表现、主动学习营造了良好的氛围,因此,练习是每个数学教师备课时应重视的一个环节。如何使学生能在练习、自学中自悟出一些科学的思维方法和一般的解题思路,从而在练习中主动获取知识呢?我认为,最为关键的就是教师在设计练习时要把握好练习设计的“五度空间”。一、练习设计要有“坡度”练习要遵循学生的认知规律,要想让学生主动学、自觉练就必 The math class takes the practice as the main line, which makes the whole class have opportunities to compete in the competition. It creates a good atmosphere for students’ self-expression and active learning. Therefore, practice is a link that every math teacher should pay attention to when preparing lessons. How to enable students to practice self-learning self-awareness of some scientific ways of thinking and general problem-solving ideas, so take the initiative to acquire knowledge in practice? I think the most crucial is that teachers should master the design practice practice design “Five degrees of space ”. First, practice design should have “slope ” practice to follow the cognitive rules of students, in order to make students take the initiative to learn,