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(一)教材说明:向日葵是重要油料作物之一。教材首先比较全面地介绍了它的经济价值,接着又简单叙达了向日葵的整个栽培技术,体现了栽培的全部过程。向日葵的适应性强,1953年和1954年,政府曾两次提出增产油料作物,号召全国人民利用不适于粮食生产的盐碱地及其他空隙荒地积极种植向日葵等油料作物。因此它已为广大儿童种植活动内容之一。它也确是一个理论与实践相互印证的好学习材料。向日葵的人工授粉,是增产的重要措施之一,也是本课介绍的主要内容。教学时要作重点讲授。不但要求儿童懂得授粉这一知识,而且要能掌握向日葵授粉的实际技
(I) Description of textbook: Sunflower is one of the important oil crops. The textbook first introduced its economic value more comprehensively, and then it simply described the entire cultivation technology of sunflower and embodied the whole process of cultivation. The adaptability of sunflowers was strong. In 1953 and 1954, the government proposed to increase the production of oil crops twice and called on the people throughout the country to actively plant sunflower and other oil crops using saline land and other wasteland that are not suitable for grain production. Therefore it has been one of the contents of the majority of children’s planting activities. It is also a good learning material that is mutually corroborated by theory and practice. Artificial pollination of sunflower is one of the important measures to increase production, and it is also the main content of this lesson. Teaching should focus on teaching. Not only do children require knowledge of pollination, but they also need to be able to grasp the practical skills of sunflower pollination.