[教学内容]北师大版二年级下册第67耀68页。[教学目标]1援结合生活情境,认识到生活中处处有角,体会到数学与生活的联系。2援通过“找一找”“折一折”“比一比”等活动,直观认识角。3援培养观察能力、动手操作能力及合作学习能力。[教学重、难点]重点:认识角的形状,知道角的各部分名称,会用尺子画角。难点:体会角的大小与它两边的长短无关,与它两边张 [Teaching content] Beijing Normal University version of the second grade under the 67th page 68th. [Teaching Objectives] 1 A combination of life situations, aware of every corner of life, experience the connection between mathematics and life. 2 aid through “find a ” fold “” than a ratio "and other activities, intuitive understanding of the angle. 3 aid training observation skills, hands-on ability and cooperative learning ability. [Teaching heavy, difficult] Important: Know the shape of the corner, know the name of each part of the corner, will use a ruler to draw the corner. Difficulties: the size of the angle of experience has nothing to do with the length of both sides of it, and it Zhang Zhang