前不久,我上了一节公开课,课题是《空气占据空间》。我设计这样一个教学活动:在学生对“水下烛光”的现象大胆质疑后,我让学生运用桌上的实验器材主动探究。我为每组提供的器材是:水槽、底部有孔的塑料杯、塑料球、注射器针管、橡皮擦(生自带)。我的意图是用这些材料可以做两个实验。 Not long ago, I went to a public class, the topic is “the space occupied by the air.” I designed such a teaching activity: After students dared to question the phenomenon of “underwater candlelight,” I asked students to take the initiative to explore the experimental equipment on the table. The equipment I provided for each group was: sink, plastic cup with holes at the bottom, plastic balls, syringe needles, eraser (self-contained). My intention is to use these materials to do two experiments.