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对于人教版六年制小学《自 然》第五册中《空气占据空间》一 课,我在经过多次教学后发现, 实验2中的部分实验设计应当 改一改。 实验2中有三个小实验。第 一个实验是:“把一团纸紧紧塞 在玻璃杯底部,将玻璃杯倒立压 入水底,猜一猜,纸团会不会湿? 把杯子提出水面看一看。”我认 为编者的意图是:演示杯底的纸 团不会湿,从而让学生初步领悟 杯子内有空气占据着空间,水进 不去,所以纸团才不会湿。但在 实际教学中,学生的实验结果并 不像编者想象的那样。班里有近 三分之一的学生在实验时,杯底
After teaching for many times, I found that part of the experiment design in Experiment 2 should be changed for the lesson of “Occupying Space in Air” in the Fifth PEP of Nature Education PEP. Experiment 2 has three small experiments. The first experiment was: “Hold a piece of paper tightly in the bottom of the glass, press the glass upside down, and guess whether the paper does wet or not. Put the glass over the water and look at it.” I think the editor The intent is to demonstrate that the paper base at the bottom of the cup will not be wet, allowing students to initially comprehend that the air in the cup takes up space and that water does not get in, so the paper does not get wet. However, in actual teaching, students' experimental results are not as the editors imagined. Nearly a third of the students in the class were experimenting with the bottom of the cup