Preview can make us have psychological preparation, can help us improve classroom efficiency.

预习可以使我们有心理准备，可以帮助我们提高课堂效率。

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After that they gave our teachers very professional reviews and guidance, and had a lively discussion about "how to improve classroom efficiency."

课后，专家对课做了点评和专业的指导，并与老师们一起就“如何提高课堂效率”进行了热烈探讨。

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This section, I will introduce extra-curricular learning how to improve the efficiency of classroom learning.

本节中，我将介绍怎样进行课外学习，提高课堂学习效率。

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