一、教学目标与要求
1。能够听、说、认读Let’s read 部分的内容；特别是能听、说、认读单词：squid, lobster,shark,seal,whale和单位词ton,meter,kg,cm;
2。能听、说、认读短语和句子：can dive into the deep cold water/jump out of water.Each up to 20 cm long.并能正确完成填充句子的练习。
二、教学重、难点分析
1。本课时的教学重点是让学生理解、会读文段内容；并能正确理解几个单位词：ton,meter,kg,cm.
2.本课时的教学难点是本部分语言知识含量大，教师需要帮助学生充分理解。
三、课前准备
1。教师准备录音机、本课时录音带和课件
2。有关鲸鱼的图片
四、教学步骤
Step1.Warm-up
1。师生用英语互致问候
2。Free talk
A: How tall/heavy are you?
B: I’m……
A:I’m…..I’m ……than you.
B:Yes,I’m …..than you.
教师和一生做示范，然后让三、四组学生互相交谈。
（设计意图：通过创设真实的情景，让学生巩固对身高和体重进行比较的语言表达法，并对下一步的阅读理解打好基础。）
3。Let’s chant
Older ,older, I’m older than you.
Taller, taller ,I’m taller than you .
Stronger ,stronger, I’m stronger than you .
Younger, younger, you are younger than me .
Shorter, shorter, you are shorter than me.
Thinner, thinner ,you are thinner than me .
But, my hair is longer than yours.
my eyes are bigger than yours.
（设计意图：通过朗朗上口的儿歌，既复习了形容词的比较级，也提高了学生学习英语的兴趣，将学生的注意力转移到课堂中来，为提高课堂效率做好准备。）
Step2。Pre-reading
(1) 课件展示两只鱼，一条鲸鱼和一条金鱼
teachet says: “Look, there are two fish,Which fish is bigger,the black one or the red one?” The students answer it together . Then teacher says: “Yes,the black one is bigger,and we call the black fish whale.”板书“whale”,并教读。出示抹香鲸和虎鲸的图片,teacher says: “This is a killer whale. This is a sperm whale.”