Education and demonstration – Mathematics – Arithmetic
Patent
1985-12-16
1987-01-06
Grieb, William H.
Education and demonstration
Mathematics
Arithmetic
434205, 434207, 434304, 434348, 434404, G09B 122, G09B 1902, G09B 1912
Patent
active
046343857
ABSTRACT:
A teaching wheel challenges a student to find the correct answer to arithmetic and other problems. The teaching wheel comprises a problem disk and an answer disk mounted concentrically for rotation on a frame. The problem disk is mounted above the frame, and the answer disk is mounted under the frame. The problem disk has a smaller diameter than the answer disk and frame. The problem disk is divided into a number of sectors, with a problem radiating outwardly in each sector. The answer disk has sectors containing the answers to the problems near the periphery of the disk. The frame is notched to reveal one answer on the answer disk. The problem disk is rotated so a selected problem sector is aligned with the frame notch, and the answer disk is rotated until the correct answer appears in the notch adjacent the problem sector. The problems may consist of counting, arithmetic equations, time equivalents, and money equivalents.
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Cayen Donald
Grieb William H.
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