课前预习是培养学生自学能力的有效环节。小学生的知识有限,不是什么问题都能通过自学解决的。但让学生自己先读先思,在疑难之处“碰碰钉子”,教师再进行指点,不仅可以提高学习兴趣,也有助于独立思维能力的发展。 Pre-class preview is an effective part of developing students' self-learning ability. Pupils have limited knowledge, not what problems can be solved by self-study. But for students to think first and think first, in the difficult place “bumps into nails,” teachers can give pointers again not only to enhance their interest in learning, but also contribute to the development of independent thinking skills.