عنوان مقاله [English]
Many discussions are available about the benefits and drawbacks of PowerPoint software in literature; however, according to the author’s review, there is not any comprehensive research about the optimum percentage of time of the classes for teaching with this software. This paper represents the best methods and percentages of utilizing PowerPoint software in classes. For this purpose, eight different classes of a university course were chosen, and each two classes were taught with a specific training method. In other words, four teaching methods containing four different amounts of times used for teaching with PowerPoint files were selected. This experimental work took four semesters. The percentages of times used for teaching with PowerPoint software were 0%, 25%, 40% and 100% respectively. The statistical analyses on coefficient errors indicate that the suitable percentages of teaching with PowerPoint are from 37% to 52% of the time of classes.