Mathematical teaching apparatus

Details Mathematical teaching apparatus Mathematical teaching apparatus

1980-05-08

1982-06-01

Grieb, William H.

Education and demonstration

Mathematics

Arithmetic

434208, 434211, G09B 1902

Patent

active

043325670

ABSTRACT:
The apparatus is used as a teaching aid for arithmetic, metric and analytical geometry and elementary algebra, and is formed by a cubic block array comprising a plurality of different size blocks arranged in rows and columns. The cubic block array has a base array of ten-by-ten blocks commencing with a one centimeter block and progressing in x and y rows with increasing length blocks (1 cm., 2 cm., 3 cm., etc.), and overlying arrays of the same pattern but progressively increasing in height (1 cm., 2 cm., 3 cm., 4 cm., etc.).

REFERENCES:
patent: 176735 (1876-05-01), Bradbury
patent: 209385 (1878-10-01), Davis
patent: 1294126 (1919-02-01), Linay
patent: 1305724 (1919-06-01), Kennedy
patent: 2899757 (1959-08-01), Webb
patent: 3208162 (1965-09-01), Wisdom
patent: 3229388 (1966-01-01), Smith
patent: 3414986 (1968-12-01), Stassen
patent: 4257175 (1981-03-01), Wentworth

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