Studies in industry link routine in work to efficiency level. Routine may contribute to boredom and decline in efficiency for some workers; others cope well with repetitive tasks and improve output. This study was conducted to determine whether repetition of a lesson by the same teacher to a second class within a week increases or decreases efficacy. Seventy-nine teachers completed a questionnaire after presenting a lesson once, and again later that week after giving it to a parallel class. The findings show that the repeated lesson was better than the first by 6-9% with respect to three of the five dimensions of successful teaching. The contribution of reflective insights to the improvement of repeated lessons and the implications for planning school programs are discussed. (Contains 1 table and 2 figures.)