我说的是九年义务教育六年制小学数学第十二册第三单元的第一节第一课时———圆柱的认识。圆柱体是学生生活环境中到处都存在的几何形体 ,通过学习 ,有利于发展学生的空间观念 ,培养学生初步的抽象思维能力和解决简单实际问题的能力。因此 ,我提出“圆柱的认识”的教学目标是 I am talking about the first lesson of the first section of the first section of the ninth unit of the nine-year compulsory education in the six-year primary school mathematics twelfth chapter --- the understanding of the cylinder. Cylinder is the geometry of students living environment everywhere, through the study, is conducive to the development of students 'space concept, develop students' ability of abstract thinking and solving simple practical problems. Therefore, I put forward the “cylinder of knowledge” teaching goal is