| 摘要 |
A teaching device for teaching students different scales of measure and aiding in the taking of accurate measurements by users of the device includes a first face that is marked with standard units of measure such as feet, inches, and fractions of inches. Each scale represents a different unit of measure scale and is arranged next to smaller scale in an order such that the feet measurement is arranged next to the inch scale. The inch measure is also arranged to the half-inch scale which is arranged next to the quarter inch scale. This continues such that each succeeding scale is arranged between a larger and smaller scale. A second face is marked with scales representing metric units of measurement. Each scale on the second face represents a unit of measurement on one order of magnitude smaller than the preceding scale.
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