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在一节课上,老师在引导学生认识空气时,预设了一个教学环节,是让学生“捉”空气,并运用感官认识空气。问题提出后,学生迫不及待地动手做起来,有的用塑料袋兜空气,有的往塑料袋里吹空气,有的用玻璃杯扣空气,有的还在商量办法。当大家兴高采烈地“捉空气”时,有个顽皮的学生开始“捣乱”了,他拿出了课间喝汽水的吸管,对着桌子上水槽里的水开始吹泡泡。那组的小组长告状
In a class, the teacher presupposes a teaching session when guiding students to know the air. It is for the students to “catch” the air and use the senses to recognize the air. After the question was raised, the students could not wait to get started. Some used plastic bags for air, some used plastic bags to blow the air, and others used glass to buckle the air, and some were still discussing ways. When everyone happily “caught the air,” a naughty student started “troublemaking.” He took out a siphon of sip water and started to blow bubbles against the water in the sink on the table. The team leader complained