在基础实践环节，可以把一个班级分成几组，组和组之间比赛，哪个组完成的又快又好，哪个组就有额外加分，并把名次写在黑板上。

In basic practice, can a class into several groups, between group and group, which group completed quickly and well, which group has the extra points, and write the places on the blackboard.

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分层教学指教师根据学生的知识、能力和潜力，科学地把学生分成几组水平相近的群体并区别对待。

Multi-grade teaching is to divide students into several groups with similar level scientifically and deal with them differently according to their knowledge, ability and potential.

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