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一、问题的提出由于概念抽象、计算复杂和应用广泛,密度一直是初中物理教学中的重点与难点。密度的学习能帮助学生深化对速度概念建立方法的理解,也与后续压强、浮力的学习联系密切,在知识与方法上都发挥着承前启后的作用。有效的教学评价能够反馈学生的学习情况,也能促进教师对教学内容的不断完善。国际学生评估项目~([1])(The Programme for International Student Assessment,简称PISA)是一项由经济合作与
First, the problem raised Due to the concept of abstract, complex computing and widely used, the density has been the focus of junior high school physics teaching and difficulties. Density learning can help students to deepen their understanding of the method of establishing the concept of speed, and is closely linked with the follow-up study of pressure and buoyancy. Both of them play a leading and influential role in knowledge and methodology. Effective teaching evaluation can feedback students ’learning situation, and also can promote teachers’ constant improvement of teaching contents. International Student Assessment Program ~ ([1]) The Program for International Student Assessment (PISA)