Hi Jennifer, I agree having fun makes classes more enjoyable. Too much laughing (every day in every class) can potentially suggest to students that the teacher is not serious. But just keeping an upbeat, enthusiastic atmosphere makes for a lively learning setting that does make a class more interesting. The important point is if a teacher's natural personality is a jovial nature, that's fine. What would less than effective would be someone trying to be funny when that's not their natural style. Barry Westling