一、教材处理1.出示“险”字，通过设问“这是什么字？看到这个字你会想到什么？”引入新课，使学生初步了解“天灾”、“人祸”是客观存在的。2.看录象：1976年唐山大地震、1991年南方水灾、上海某地区火灾（录像来源：人民教育出版社《社会》第二册）。教师让学生联系实际说 First, the textbook processing 1. Show “risk” word, by asking “What is this word? See this word you will think of?” The introduction of a new lesson to enable students to understand the initial “natural disasters,” “man-made disasters,” is an objective reality . 2. Video: The 1976 Tangshan Earthquake, 1991 Floods in the South, and Fires in a Certain Area in Shanghai (Source: People's Education Press, 2nd Volume). Teachers let students contact the actual say