What is fast pacing in English

Pace refers to the speed of the class. It is a subjective judgement, connected with how it feels for the learner to go through the sequence of activities in a class.

Explanation:

Some activities inevitably affect the pace of a class, for example, a whole group brainstorming activity will work best at a fast pace and an intensive reading at a slow one.

I think it might be being ahead of pace, but Im not sure