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教学内容:五年制教材第四册第十一课教学目的要求:参看自然第四册《教师用书》P.83。教学重难点:教学重点是认识消化的意义,消化器官的组成和功能。教学难点是指导学生用鱼鳔实验理解消化的概念,用唾液消化淀粉实验理解唾液对淀粉的消化作用。
Teaching content: Five-year teaching materials Volume IV Eleventh lesson Teaching objectives and requirements: See the fourth volume of natural “teacher's book” P.83. Teaching difficult and difficult: the focus of teaching is to understand the significance of digestion, digestive organs composition and function. The teaching difficulty is to guide students to understand the concept of digestion with the experiment of mandarin fish, digestive starch experiment with saliva to understand the saliva digestion of starch.