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初中生物第一册（下）《原生动物门》一课中“观察草履虫实验”，指导学生认识草履虫的形态结构及生理是本节课的教学重点。而教材仅让学生观察了草履虫的形状和运动，至少存在两个方面的不足之处：①降低了实验价值。课前花很大的精力采集和培养草履虫，而实验中仅观察草履虫
The “observation of paramecium experiment” in the first book of junior high school biology (bottom) “Protozoa” teaches students to understand the morphological structure and physiology of Paramecium is the teaching focus of this lesson. The textbook only allows students to observe the shape and movement of paramecium, at least there are two deficiencies: 1 reduces the value of the experiment. It takes a lot of energy to collect and cultivate paramecium before class, but only observing paramecium in the experiment