四年级下册Unit 4 At the farm Part B精品ppt课件

The sixth period（第六课时）

Part B Let’s check & Let’s wrap it up

▶ 教学内容与目标

▶ 教学重点

能够复习并巩固本单元所学的核心词汇和句型。

▶ 教学难点

    1. 能够运用一般过去时与一般现在时两种时态对图片进行对比描述。

2. 能够理解Story time板块的趣味故事。

▶ 教学准备

PPT课件、课文音频、视频等。

▶ 教学过程

Step 1: Warm-up & Revision①

1. Greetings.

Greet the students.

2. Let’s sing—Changes in me.

Play the song—Changes in me. （出示课件）Sing together.

3. Quick review of the key words and phrases of this unit. (课件出示：本单元的重点单词及短语）

◆ Teaching purpose①

通过歌曲带领学生复习本单元的核心词句，为后面的复习和巩固做好铺垫。同时在课前营造轻松愉快的课堂氛围，提高学生的学习兴趣。

Step 2: Presentation & Practice

1. Changes between then and now.②

Observe the changes of frogs. (出示课件) The teacher makes a model at first.

T: When it was a tadpole, it had a tail. Now it becomes a frog. It has no tail.

Lead students to pay attention to the differences in time and verbs. Students learn to use the simple past tense and the simple present tense to describe things properly and correctly. T: Can you describe the changes in this girl and this boy?

S1: She had long hair. Now she has short hair.

S2: He played the guitar. Now he plays basketball.

◆ Teaching purpose②

通过三幅图片的今昔对比，引导学生用一般过去时和一般现在时描述对比状态。

2. Let’s check.③

(1) Present the pictures in “Let’s check”. (课件出示：Let’s check板块的图片) Lead students to get detailed information from the pictures and predict the main idea of the listening materials.

T: What did he always do many years ago?

S1: In Picture 1, he always read a book under the tree.

S2: In Picture 2, he always rode a bike.

S3: In Picture 3, he always went ice-skating in winter.

(2) Let students listen and number the pictures and then check the answers with the teacher. (课件出示：Listen and number的答案)

(3) Let students read the words below the pictures. Listen again and cross the words they didn’t hear. Then check the answers with the teacher. (课件出示：Let’s check板块第二部分的练习及其答案)

(4) Present the listening materials. (课件出示：Let’s check板块的听力材料) Let students read the passage together and try to understand the context.

◆ Teaching purpose③

带领学生读图，了解图片信息，预测听力语篇的内容，检测学生对核心词句的掌握情况。通过听音标序和划词的活动形式帮助学生进一步理解听力文本。

3. Let’s wrap it up.

Changes are all around us. Talk about the changes below.

(1)The teacher makes a model at first. Show students how to describe the changes. (课件出示：Let’s wrap it up中Chen Jie身高对比的图片)

T: Look at the picture of this girl. Chen Jie was short before. (Point to the low height when she was a little girl.) Now she is 1.5 metres tall. (Point to the height of 1.5 metres.) It’s the difference between then and now. You can say like this “Chen Jie was short before. Now she is 1.5 metres tall.”

(2)Present Picture 1(课件出示：Let’s wrap it up板块中的图片1 ) Lead students to say: It was an egg. Now it is a hen.

(3)Work in pairs. Talk about the changes according to the pictures. Then act out. (课件出示：Let’s wrap it up板块中的图片2、3、4、5)

S1: It was raining. Now it is sunny.

S2: In summer, the tree was green. Now it is yellow.

S3: There was a building before. Now there is grass.

S4. : The cat was on the chair. Now it is under the chair.

◆ Teaching purpose④

引导学生观察和对比左右两幅图片的不同，用一般过去时和一般现在时两种不同的时态进行描述，复习和巩固本单元的核心语法点，让学生能够熟练地表达事物的今昔对比。引导学生通过上述的学习活动自己归纳和总结核心句型，提高自主学习能力。

(4)Make a brief summary.

T: When we describe the changes between then and now, we can express like this “It was…/There was/were (no/not)… It is…now./There is/are (no/not)…now.” You can also add some adverbial expressions of time of the present or the past.

4. Group work—Changes in my friend.⑤

Work in groups. One partner talks about his or her changes. Other partners take brief notes while listening. Then make a report to present the partner’s changes.

The teacher makes a model at first. Ask a student to talk about his or her changes. The teacher takes notes on the blackboard while listening, and then retells the student’s changes.

S1: Three years ago, I was short and fat. My hair was long. I didn’t like art. Now I am tall and thin. My hair is short. I like art very much.

T: Three years ago, he was short and fat. His hair was long. He didn’t like art. Now he is tall and thin. His hair is short. He likes art very much.

Then let students conduct the activity like this in groups. Ask several students to act out.

◆ Teaching purpose⑤

以小组活动的形式让学生熟练运用本单元的核心词句进行表达，提升学生的语言综合运用能力。

Step 3: Consolidation & Extension⑥

“Story time”

1. Watch the video of “Story time”. (课件出示：Story time板块的视频)

Read and answer the question.

◆ Teaching purpose

观看故事视频，初步感知故事内容，把握主旨。分层学习故事内容，逐步深入了解文本，加深理解。

2. Pictures 1~3.

(1)Read Pictures 1~3 and answer.

T: Did cavemen cook their food?

Ss: No, they didn’t.

T: Who will cook, clean and wash the dishes in 2050?

Ss: House robots.

(2)Read this part after the recording and learn the sentences in Picture 1~3, especially the new words “cavemen, raw, cook, do the dishes”. “Do the dishes” means “wash the dishes”. (课件出示：Picture 1的相关内容)

3. Pictures 4~6.⑦

(1)Read Pictures 4~6 and complete the sentences. （出示课件）

(2)Answer the question: What should we do?

Ss: We should help the earth now.

T: Excellent job! Learn the word “should”.

(3)Read this part after the recording and learn the sentences in Picture 4~6, especially the words “more and more, should” and the sentence “How beautiful the world was!”

4. Pictures 7~9.

(1)Read Pictures 7~9. Judge T or F and present the judging clues.

(2)Tell students that if humans want to have a bright future, we must heal the earth and make it a better place. Call on every student to protect the environment.

◆ Teaching purpose⑦

丰富语言输入，拓展关于描述今昔对比的相关表达。了解人类和自然环境的变化，树立环保意识。

▶ 板书设计

▶ 作业设计

1. Read the story and write a passage about the changes in your friends.

2. Do the exercises.

▶ 教学反思

1. 利用快速复习的方式，激活学生的相关词汇和本单元学习的背景知识。歌曲导入不仅能帮助学生有效复习单元核心词汇和句型，还能在课前营造轻松愉快的课堂氛围，增强学生的学习兴趣。

2. 教学流程之间逐层递进，不断深入，以学生为主体，注重对学生的引导和启发，培养学生的思维能力。

3. 通过不同层次的语言活动设计，引导学生逐渐拓宽表达，从半开放式到开放式，复习和巩固本单元的核心语法点，让学生能够熟练地表达事物的今昔变化，提高语言综合运用能力。

4. 通过学习故事，丰富语言输入，拓展本单元主题的相关表达，了解人类和自然环境的变化，树立环保意识。

▶ Teaching Contents & Teaching Aims

Let’s check

      Be able to consolidate the key words and sentence patterns in this unit by completing the listening exercise.

      Be able to predict the test points through the questions and pictures, and try to catch the key words to complete the exercises while listening.

      Develop good listening habits and improve listening ability.

Let’s wrap it up

      Be able to review and consolidate the key sentence patterns of this unit.

      Be able to describe the pictures in contrast by using the simple past tense and the simple present tense properly and correctly.

▶ Teaching Priorities

      Be able to review and consolidate the key words and sentence structures of this unit.

▶ Teaching Difficulties

      Be able to describe the pictures in contrast by using the simple past tense and the simple present tense properly and correctly.

      Be able to understand the content of “Story time”.

▶ Teaching Procedures