PROBLEM TO BE SOLVED: To provide a teaching material authoring system capable of setting an optimum display time in each scene. SOLUTION: A first material composed of slides including at least still images, a second material including at least audio and / or moving images, a slide display unit for displaying one slide, and first and second materials. It is possible to select the next slide of the slide displayed on the slide display regardless of the authoring method for authoring the teaching material in combination with and whether or not the authoring is executed, and the selected slide is displayed on the slide display. One of the possible first-choice display means and one of a plurality of slides can be selected when the authoring is not executed, and the selected slide is displayed on the slide display unit, but the slide is displayed when the authoring is executed. Is provided with a second selection display means that makes it impossible to select. [Selection diagram] FIG. 5
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