论文部分内容阅读
【教材解读】《三角形的内角和》是青岛版四年级上册第四单元的内容,是在学生已经认识了三角形并了解角的分类和三角形的分类的基础上,进行教学的。这部分知识的学习是为学生中学深入学习三角形的知识做基础。本节课,学生通过观察、猜想、验证、推理和操作,历经知识形成的完整过程,是学生学习几何知识,促进空间观念发展的重要一课。【教学目标】1.明确三角形内角和的概念,学生通过观察、操作、发现三角形的内角和的特点。
[Interpretation of textbooks] “Triangle and the triangle” is the fourth edition of the fourth edition of Qingdao version of the content of the book is in the students have been aware of the triangle and to understand the classification of triangles and triangles based on the classification, teaching. This part of the knowledge of learning is for students to learn the triangle to learn the foundation. This lesson, students through the observation, conjecture, verification, reasoning and operation, through the formation of a complete process of knowledge, students learn geometry and promote space concept of an important lesson. 【Teaching Objectives】 1. To clarify the concept of internal angles and triangles, students observe, manipulate, and found that the characteristics of the internal angles and triangles.