自然教学大纲明确指出:“教师要鼓励和辅导学生开展课外自然研究活动,并力求把这种活动化为他们乐于从事的经常性活动,使他们在活动中扩展知识,发展兴趣、锻炼能力。” 《花的构造》一课,要求通过研究白菜花和桃花,初步建立“完全花”的概念。为了完成本课教学目标,激发学生对自然科学的兴趣,培养学生多方面的能力,我以校园内的桃树为观察对象,设计以下系列观察实践活动,取得较 The Nature Syllabus clearly states: “Teachers should encourage and mentor students to conduct extra-curricular natural research activities and strive to turn such activities into recurring activities that they are happy to engage in, so that they can expand their knowledge, develop interests and develop their abilities in activities.” The lesson of “Flower Structure” requires that the concept of “complete flower” should be initially established through the study of cabbage and peach. In order to complete the teaching objectives of this lesson, to stimulate students 'interest in the natural sciences and to cultivate students' abilities in many fields, I took the peach tree in the campus as the observation object and designed the following series of observation and practice activities to achieve a