一、背景本学期教材中有“分数的初步认识”这一内容,翻开教材备课时我陷入了困境:一方面该内容是数的概念的又一次扩展,是分数知识的起始课,对后续学习非常重要;另一方面,反复构思的几个教学方案要么学习要点不明晰、思路比较杂乱,要么思路清晰了,但自己的牵引痕迹明显,学生的 First, the background of this semester textbook, “a preliminary understanding of the score” of this content, open textbooks lesson when I fell into a dilemma: on the one hand the content is the number of the concept of another expansion, is the beginning of the fraction of knowledge, Follow-up study is very important; on the other hand, several teaching ideas repeatedly conceived either learning points are not clear, more messy ideas, or clear thinking, but their traction marks obvious, students