Timing is concerned with the management of the time available for each class, that is, when certain things happen.
Pace is more concerned with the rate at which the students work.
All students work at a different pace and they thus need to be allowed to work at a rate at which they feel comfortable. CEWw provides a number of ways of preventing some students from falling behind because the pace is too fast and of preventing others from getting bored because the pace is too slow. Different types of classroom activities will naturally have a different pace. For example, oral discussion with the whole class may be experienced as 'faster' than individual writing. These differences in pace can be used to give variety to the shape of the lesson and thus sustain interest.