| 摘要 |
A teaching device is disclosed which permits the utilization of both the visual and tactile senses during the learning process. The device includes a main frame, one end of which carries information conveying means consisting of a rotatable roller having removable covers attached thereto which carry raised figures or symbols such as numbers or letters, for example,. The opposed end of the frame slants away from the first end and carries a work surface suitable for writing purposes. The device also includes a support member which is essentially U-shaped in cross section and is capable of receiving the main frame on its top, whereby the overall device may be utilized as a lap desk, for example.
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