一、教学前思《封闭图形中的植树问题》是人教版小学数学教科书(2014版)五年级上册新增加的内容,它是在教学沿着一定的线段路线植树(两端都植和一端植一端不植)之后的封闭图形的植树问题。对于新课改中增加的教学内容,我们在教学中要理解增加背后的意图,把握教学的整体目标,在学生的经验中寻找兴趣点、提升点。 First, the teaching of pre-thinking “Tree planting in closed graphics” is a new addition to the fifth grade of the PEP Edition Mathematics Textbook (2014 Edition). It is teaching planting trees along certain line segments Planting one end is not planted) after the closed tree planting problem. For the new teaching content added in the new curriculum reform, we should understand in the teaching to increase the intention behind the grasp of the overall goal of teaching in the student’s experience to find points of interest to enhance the point.