教学《种子的萌发》一课,要研究种子的萌发是否需要空气,不少学生猜测两组(一组种子完全在水中,一组种子的一半在水中)都可以萌发,有学生还举例说黄豆完全泡在水里也长芽,有的说:“我看到一粒种子掉到鱼缸里后来就长出芽来了。”他们这么一说让我顿时没了主意,按教材的设计把种 Teaching “germination of seeds,” a class to study the germination of the seeds need air, many students speculate that two groups (a group of seeds completely in the water, a group of seeds in water half) can germinate, some students, for example, soybeans The whole bubble in the water also sprouts, and some said: “I saw a seed fell into the tank later came to bud.” They say so I suddenly did not idea, according to the design of the teaching materials