Education and demonstration – Measurement of length or volume
Patent
1985-12-23
1988-01-26
Grieb, William H.
Education and demonstration
Measurement of length or volume
273302, 434209, D21 42, G09B 1900, A63F 100
Patent
active
047214678
ABSTRACT:
The invention comprises a deck of playing cards for teaching and learning basic metric system words and prefix values in an enjoyable manner. The deck comprises a plurality of suits of cards; each suit includes a plurality of cards with each card within a suit having a back side and a front side. On the front side, a relative metric prefix value indicates the value of each card. The deck comprises four suits of thirteen cards in each suit thereby facilitating use of the cards in playing traditional card games. According to one embodiment, the front of each card includes a list of the values of all cards within the suit in order and, the value of that particular card is distinguished in the list of values. The invention also includes a plurality of decks of cards which are dividable into decks having different levels of difficulty.
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Grieb William H.
Tervo Calif Kip
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