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【教材分析】这是一篇科学童话。它通过小青蛙在石桥洞里听到自己的回声以及和妈妈对话,生动有趣地说明了什么是回声和产生回声的原因,深入浅出地为我们介绍了一个科学知识。课文优美、生动,动静结合,给人以美的享受。【教学目标】1.有感情地朗读课文,背诵课文第四段,学写“哪”“倒”两个字。2.随文理解“哪”的不同用法和“荡”的含义,在理解重点词语的过程中读懂课文。3.了解回声形成的原因,激发探索科学的兴趣。
[Textbook analysis] This is a scientific fairy tale. Through a small frog in the stone bridge hole to hear his echo and dialogue with his mother, vivid and interesting to explain what is the echo and the reasons for echo, explain profound theories in simple language for us to introduce a scientific knowledge. Text beautiful, vivid, static and dynamic combination, giving the United States to enjoy. 【Teaching Objectives】 1. Emotionally read the text, recite the fourth paragraph of the text, learn to write “which ” “down ” two words. 2. With the text to understand “Which ” of different usage and “Dang ” meaning, understand the key words in the process of reading text. 3. Understand the causes of the formation of echoes, stimulate exploration of scientific interest.