1978-01-09
1979-12-04
Grieb, William H.
G09B 1902
Patent
active
041764722
ABSTRACT:
A numbers teaching aid particularly useful in teaching single digit numbers to children. The teaching aid comprises a series of flip cards in which each flip card illustrates a number in the number sequence of 0-10, and a plurality of beads equal in number to the highest flip card number. The beads are aligned on a rod in an unchangeable sequence, and are slidable on that rod relative one to another between a storage position and a number equivalent position. The numbers on the flip cards are colored different colors, and the beads are likewise colored different colors, the color of each bead in the number equivalent position being the same as the color of that flip card number to which that bead is an equivalent.
REFERENCES:
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patent: 380532 (1888-04-01), Siefert
patent: 1244000 (1917-10-01), Soltoft
patent: 1466501 (1923-08-01), Gamble
patent: 1664808 (1928-04-01), Cooper
patent: 2867917 (1959-01-01), Carlton
patent: 3811205 (1974-05-01), Pitzler
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