小学自然课程标准指出,探究是学生学习科学的主要方式。探究可以促进学生的思维,提高学生发现问题、研究问题的能力,培养学生的知识建构能力。因此,教师应善于为学生创设自主探究的时空纬度,即给学生更多的自主机会,让学生经历探究过程,使之 Primary school nature curriculum standards point out that inquiry is the main way for students to learn science. Inquiry can promote students’ thinking, improve students’ ability of discovering problems, studying problems, and cultivating students’ knowledge building ability. Therefore, teachers should be good at creating a space-time latitude for self-exploration, giving students more opportunities for self-study, allowing students to go through the process of inquiry so that