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科学教师通常有这样的感受:在新课程改革后的科学教材中,很多实验材料在实验室不一定能找到,需自己走出实验室,走进生活中寻找,再直接或进行处理后加以利用。这些在费心寻找后才得到的材料如不是消耗品,可在使用后单独专柜编号存放,便于上同一课时再次使用。在一次偶然的教学实践中,笔者发现普普通通的毛巾也可以在其他不同的教学内容中重复使用,大大提高了它的利用率。一、毛巾在“它们吸水吗”课例中的巧用
Science teachers often have the feeling that in the new textbook after the reform of the science textbooks, many experimental materials in the laboratory may not be able to find, you need to walk out of the laboratory, into the life to find, and then directly or after treatment to be used. If these materials are not consumable items, they can be stored in a separate counter after use so that they can be used again in the same class. In a casual teaching practice, I found that common towels can be reused in different teaching contents, greatly improving its utilization rate. First, the towel in the “they absorb it,” the case of clever use