三角形的认识（Understanding of triangles）.docVIP

三角形的认识（Understanding of triangles） Collect and organize yourself Mistakes are inevitable For reference only If there are any mistakes Please correct me! thank you The teaching design of triangle cognition Li guorui, no.1 primary school, huangcun town, daxing district Teaching objectives: Knowledge and skill goals: understand the concept of triangles Master the characteristics and characteristics of the triangle We can classify triangles by triangle Angle Process and method objectives: cultivate students ability to compare, analyze and summarize Develop students innovative thinking Emotional attitude and value goal: cultivate students spirit of unity and cooperation in the study of group cooperation Stimulate students interest in mathematics Enhance your learning confidence Teaching key points: Understand the concept of triangles Teaching difficulties: Distinguish acute angles triangles, right-angled triangles and obtuse triangles Teaching process First, create a situation To import new lesson 1. Story introduction Conversation: there is a lovely group of graphic dolls living on the beautiful prairie They have fun playing games all day! Can you name them? Three graphic dolls were late Who are they, please? 2. Disclosure of topics Today, In this lesson, lets take a look at three of the late graphic friends - triangles Ok? Ii. Interaction between teachers and students Guide the exploration (1) understand the meaning of the triangle 1. Feel the triangle in kind The classmates What objects have you seen in the shape of a triangle in your daily life? Students have discovered so many triangles in their lives The teacher also collected a set of video information about the triangle Lets take a look (play video) At the beginning of the new class Bring the triangle of life into the classroom Apart from stimulating students interest in learning and revealing the subject What is more important is to enrich students sense of the triangle. Explore the meaning of triangles We know