1. Different teaching materials: the fast class has audio-visual, oral, translation and writing courses, and the China native culture English reading guide is highly extensible, but the slow class does not.

2. The content of the exam is different: the content of the quick class exam is random, and there is no mandatory requirement to endorse a certain content. There is something to be endorsed in the final exam of slow class.

3. Different scoring ratios: the average hours of fast classes are larger, while the average hours of slow classes are smaller.