地球与宇宙这部分内容是小学科学五大主题内容之一,在小学科学教育阶段居重要地位。小学生受认知水平发展的限制在学习这部分内容时,难度较大。为提高教学有效性,在教学准备、教学实施等方面进行了新的探索与实践。明确的教学目标是进行有效教学的前提,教学实施过程中采用的策略,开展的探究活动,则是开展有效教学的根本。而全面多样的教学评价既能促成教学的有效性又能衡量教学的有效性。 This part of the Earth and the Universe is one of the five major topics in primary science and plays an important role in primary science education. Primary school students by the cognitive development of the limitations of learning this part of content, more difficult. In order to improve the effectiveness of teaching, new exploration and practice have been carried out in teaching preparation and teaching implementation. Clear teaching objectives are the premise of effective teaching, teaching strategies used in the implementation process, to carry out the inquiry activities, it is the basis for effective teaching. The comprehensive and diverse teaching evaluation can not only promote the effectiveness of teaching but also measure the effectiveness of teaching.