3.Lead in the two new words: green, purple
Teacher puts up a bottle of red paint and a bottle of blue plaint. Have Ss pay attention to see what will happen when the two colors are mixed together.
T: What color is it?
S1: It’s blue.
T: What color is it?
S2: It’s yellow.
T: What happened? What color is it?
Ss: It’s green.
【设计意图】用颜色混合的方法，把学生的好奇心激发起来，学生很专注地观察到，由黄色和蓝色混合起来的两种颜色会变成另外一种颜色绿色。
4.Ask the student to do this experiments. （Mix blue and yellow.）
T：Now it is your turn. You can mix red and blue. What will happen?
T: What color is it?
S: It’s purple.
【设计意图】刚才老师的实验已激发了学生兴趣，从观察转向动手，这种学习方式采用得非常到位，合适的课堂动手能力的培养，往往能使学生积极参与课堂的教学活动并能从所得的答案中获取知识，有效地提高英语课堂教学效率。
5.Practice to read the words.
（评：在朗诵单词的时候，让会读的学生自己站起来大声读，这样的课堂气氛非常好。）
Step 4 Play a game.
1.Listen and read the words.
2.Listen and do the action.
【设计意图】三年级学生对英语有着浓厚的学习兴趣，学生对色彩有较强的敏感程度，更容易引起学生的兴趣，这些都有利于新知识的教学，学生能在比较轻松的环境中学习新课内容。避免了课堂教学的枯燥 。
Step 5 Finish the exercise.
（适当的练习可让学生更巩固所学的内容）
Step6. Conversation
1.Listen and look
2.Listen again, and point to the sentences.
3.Act about the conversation.
【设计意图】利用多媒体展现对话的内容，更容易吸引学生的注意力，同时用有趣的生活故事来巩固所学的句型和单词，并让每位学生都可以自由发挥，大胆开口说英语，没有约束力。
Step 7 Homework
Copy the words, and then use the colors to make our homework more beautiful .
Step 8 Blackboard design
Unit 9 What color is this?
It’s red.
blue
yellow
orange
purple
green
white
black