实验材料的选择与使用往往会影响学生探究的过程和科学的实验结论,在课堂中合理地使用这些材料,是上好每节科学课的基础。那么,如何有效准备、呈现和使用实验材料呢?一、有效呈现材料,提高实验效果当前教学中却存在“材料的无序发放和发放无结构性”的混乱现象,造成学生对手中有结构的材料,不知道该何时使用,该如何有序使用? The selection and use of experimental materials often affect the process of student inquiry and scientific experimental conclusions. The rational use of these materials in the classroom is the basis for a good science lesson. So, how to effectively prepare, present and use experimental materials? First, the effective presentation of materials to improve the experimental results exist in the current teaching “disorderly distribution of materials and distribution of non-structural ” chaos, resulting in student opponents have Structure of the material, do not know when to use, how to use it orderly?