一、应当以学科教学为基础综合性的实践活动虽然说是课堂教学之外的拓展活动,但却与课堂教学密切相关。因为小学生的科学知识和活动能力是有限的,进行综合实践活动所需要的智力支持、知识能力和经验意识等,都必须以自己所学到的学科知识为基础。所以,学校内的课堂教学便成为综合实践活动的重要基础,这并不是说这是课堂教学的重复和再现,而是课堂的拓展与深化。我在组织探讨植物根的作用时,让学生回家开展了一次小调查:“植物的根最多有多少条?”学生回家后,很有兴趣地进行了考查实践。有的认为小麦的根最多,有几百条;有的认为大树的根最多,可 First, should be based on subject teaching Comprehensive practice Although activities outside the classroom to expand activities, but with classroom teaching is closely related. Because primary school students have limited scientific knowledge and activities, the intellectual support, knowledge ability and experience necessary to carry out comprehensive practice activities must be based on the knowledge of the subjects they have learned. Therefore, the classroom teaching in schools has become an important foundation for comprehensive practical activities. This is not to say that this is the repetition and reproduction of classroom teaching, but rather the expansion and deepening of the classroom. When I was discussing the role of plant roots, I asked the students to go home and conduct a small survey: “What is the maximum number of roots in plants? ” After the students came home, they conducted the study with great interest. Some think that the most roots of wheat, there are hundreds of; some believe that the largest tree roots can be