习题教学是学校教育最常见的一种教学形式,面对这种形式,命题能力也变成每个教师的一种教育教学素养.如何提升教师命制试题的价值,需要教师不断分析与研究.笔者以苏科版八年级下册的一道探究题为例,解剖这道例题的利与弊,价值与误区,借此提升教师的命制能力,提升试题的训练效果.原题用图1所示装置探究“物体的动能大小与哪些因素有关”.将小球A、B分别拉到与竖直方向成一定角度θ的位置,然后都由静止释放,当小球摆动到 Exercises teaching is the most common form of education in school education, in the face of this form, the propositional ability has become a kind of education and teaching accomplishment for every teacher.How to improve the value of teachers’ life-making questions requires teachers to constantly analyze and research. The author of the eighth edition of the Su Ke version of a search questions, for example, to dissect the pros and cons of this example, the value and misunderstanding, in order to enhance the ability of teachers to improve the test results, the training effect. Show device to explore “the kinetic energy of the object and what factors ” will be the ball A, B, respectively, and the vertical direction at an angle θ position, and then by the static release, when the ball swing