Visual teaching aid

Details Visual teaching aid Visual teaching aid

1993-05-03

1994-11-22

Apley, Richard J.

Education and demonstration

Measurement of length or volume

434191, 434195, G09B 1900

Patent

active

053663780

ABSTRACT:
A visual teaching aid adapted for the versatile teaching of various mathematical relationships, incremental scales, and other sequential and educational concepts. The teaching aid includes an elongated board, a plurality of elongated insert cards each being interchangeably mountable on the board and having numerical indicia on a face thereof, and at least two pointers that are supported for movement along the board for pointing selected indicia on the insert card and for movement relative to each other. The insert cards are removably mountable on the board without removal and replacement of auxiliary fastening means and can be used in conjunction with relatively small sized base or whole number insert cards to assist in drills of mathematical relationships.

REFERENCES:
patent: 1683827 (1928-09-01), Ingram
patent: 2647327 (1953-08-01), Guichard
patent: 2915834 (1959-12-01), Burch et al.
patent: 3410002 (1968-11-01), Mulholland et al.
patent: 4144657 (1979-03-01), Dumovich
patent: 4192085 (1980-03-01), Bonorand
patent: 4842521 (1989-06-01), Johansen

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