随着对科学教育认识和理解的不断深入,我们发现,现在的科学课单元教学,都是在努力围绕一个核心概念展开。以往在教学中,由于没有深入分析教学内容所蕴含的内在关系,缺少了“大单元教学”的意识,所以在每一个新单元第一课的教学中,往往没有关注学生最初科学概念建立时的表现,以致于学生后继的学习是孤立的,建构的科学概念之间缺少了关联,没有形成整体认识,这对于科学学习也就失去了一定的意义。 With the continuous deepening of our understanding and understanding of science education, we find that nowadays science-based unit teaching is all endeavoring to focus on a core concept. In the past, there was a lack of awareness of the teaching of large unit due to the lack of in-depth analysis of the inherent relationships contained in teaching contents. Therefore, in the teaching of the first lesson of each new unit, students are often not concerned with the initial establishment of scientific concepts So that the student’s subsequent study is isolated, the lack of connection between the construction of the concept of science, did not form a holistic understanding, which also lost some of the significance of science learning.