Since the 1990s, the benefits of task repetition have been fairly widely discussed. However, they are generally limited to the discussion of the repetition of "tasks"in the technical sense of the term - a communicative activity which involves learners in exchanging information in order to achieve a specific objective. Willis, (1996:36), for example, defines a task as “a goal-oriented communicative activity with a specific outcome, where the emphasis is on exchanging meaning not producing specific language forms."
Several of the articles in the Notebook, though not necessarily following the other principles of task-based learning that Willis advocates, discuss the value of communicative task repetition in improving fluency. See for example here, here and here. All of these articles describe an approach using the following steps : Silent planning - Language Input - Task Enactment - Follow up (feedback and further language input) - Task Repetition - Feedback - and possibly further repetition.
This differs from some other writers' use of task repetition in that the task is repeated, sometimes more than once, in rapid succession within the same lesson rather than in later lessons. The communicative orientation of the task means that it can be enacted each time with different partners, which helps to prevent boredom - a new partner means new input. In the anecdote telling sequence described in the articles cited above, for instance, although learners are repeating their own anecdote, the new partner means they are listening to a different one.
The challenge of incorporating the language they received in the Feedback/Language Input stages also means that they are aware of improving their own anecdote on each telling, while very strong learners, who might not need as much chance to "polish" their performance as others, can be kept involved by being given the extra challenge of telling one of the anecdotes they have heard (and thus needing to retrieve and use different language), rather than their own.
What most writers don't discuss is whether there is any value in repeating other activities - not necessarily tasks, but including "ordinary" exercises such as gap-fills, matching activities, word ordering activities, dialogue practice etc - and if so, when this should be done and again how boredom can be avoided. The only writer I know who touches on this is Thornbury (2010), who uses "task" in a much wider sense than the Willis definition above, to include any activity that occurs in the classroom.
Like Thornbury, I would support the repetition of all types of activity. Rather than repeating these activities in the same lesson, however, I would argue that they can most usefully be recycled in the next, or even later lessons.
Why? The first reason is the importance of review. Many studies, eg Keely (1997) have shown the importance of review in ensuring retention of material. And yet, in my experience, few EFL teachers start the lesson with any sort of review of what was covered last time. The repetition of an activity from the previous lesson or an earlier one can provide that opportunity. The possibility of boredom is lessened by the gap in time between the lessons, and there's the chance of motivation being increased if they see that they did the activity better the second time around.
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