| 摘要 |
A visual instruction apparatus employing individual frames, each of which has a primary image zone containing a presentation of learning material and/or a question with multiple choice answers, and a row of secondary image zones in which one such secondary zone would be a response for the correct answer, the remaining secondary zones being for notification or instructions for incorrect answers, or for a series of steps in problem solving. The apparatus has a projection system and a viewing screen, and is provided with shutters which normally mask the projected images from the secondary zones. Each shutter may be opened by the student by manual operation of an associated push button corresponding to a particular answer selection. Where score keeping is desired, each frame is also provided with a row of indicator zones associated with respective secondary zones. Each indicator zone is either transparent or opaque depending on whether the corresponding selection is correct or incorrect. If correct, as the corresponding shutter is opened the light projected through the transparent indicator zone is reflected from the rear of the shutter and momentarily redirected to a photocell, causing activation of a right answer counter. Through the use of two rows of indicator zones, incorrect answers may also be separately counted or answers may be scored on a weighted basis.
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