To resolve this issue of teacher tasks as a solution for experimenting with the development and evaluation of a task. Furthermore, a retrospective evaluation can help teachers determine whether a material can be used again, an activity that works or not, and how materials can be modified so that it can increase the effectiveness of the tasks in the lesson in the future (Ellis, 1997). In addressing the problem in mind there is a background to the question how to design a master class and evaluate task? That is, there are three tasks
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