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1、|a|的越大，抛物线的开口程度越小，越靠近对称轴y轴，y随x增长（或下降）速度越快；四年级英语上册 Unit 1 This is my new friend（Lesson 4）教案 人教精通版Unit 1 This is my new friend. Lesson 4 5、多一份关心、帮助，努力发现他们的闪光点，多鼓励、表扬他们，使其体验成功、努力学习。一、Teaching aims: 1. Knowledge: To learn the new letters words and sentences. 2. Ability: Can use the words and sentences.
2、3. Emotion: Cultivating interest of students in learning English. 二、Important points: New letters words and sentences. 三、Difficult points: 圆心角：顶点在圆心的角叫做圆心角.Can use English to communicate. (3)三角形的外心的性质:三角形外心到三顶点的距离相等.四、Preparation: recorder courseware 五、Teaching Steps: 一年级数学下册教材共六个单元和一个总复习，分别从数与代数、空间
3、图形、实践活动等方面对学生进行教育。1、Warm-up,Revision (1)三边之间的关系：a2+b2=c2；1) Lets sing. (Where are you from?) 2) Game: (Whats missing?) 2、Presentation 1) Look, ask and answer. (Whos this/that? This/That is my ) 2) To learn the new words and sentences. 3) Listen and read. Then act it out. 4) Look and retell the dialo
4、gue. 5) To learn the new letters. ( Pp Tt ) 3、Practice 1) Listen and number. d=r 直线L和O相切.2) Look and match. 4. Knowledge extension Everyday English 5. Assessment Group evaluation 1 6. Homework 1) Listen and read the dialogue after class. 2) Copy the letters. 7.Writing design: (一)教学重点Unit 1 This is my new friend. Lesson 4 Hes cool. driver teacher farmer Whats your father? Pp Qq Rr Ss Tt Hes a teacher. 上述五个条件中的任何两个条件都可推出其他三个结论。After-class summary: 等弧：在同圆或等圆中，能够互相重合的弧叫做等弧。2