Abstract: An improved teaching device for use in imparting education to students comprises a teaching display board having a flat, curved, globular or other shape of extended surface area, at least one set of related units of informational material, such as pictures of birds, animals or the like and means for releasably securing them to the board.The device further includes a set of related indicia-bearing captions for each set of units of informational material, and means for releasably fixing the captions to the board adjacent the informational material. Each caption also bears at least one physical key for proper correlation of that caption with a single one of the informational units. Such key may be, for example, the length, shape, size, color, smell or the like of the caption relative to the particular informational unit.Each caption and/or informational unit may also bear a second physical key indicating the inherent degree of difficulty of correlating said captions with said informational units.