Teaching aids

Details Teaching aids Teaching aids

1988-02-29

1989-08-15

Grieb, William H.

Education and demonstration

Mathematics

Arithmetic

434199, G09B 1902

Patent

active

048569984

ABSTRACT:
An improved teaching aid including a plurality of parts, each of the parts having arithmetic indicia printed thereon, the parts being operatively coupled and relatively moveable with respect to each other to vary the location of the arithmetic indicia of one part with respect to the arithmetic indicia of the other part for presenting a student with different preselected arithmetic indicia representing different arithmetic problems to be solved.

REFERENCES:
patent: 43545 (1864-07-01), Bugbee
patent: 236320 (1881-01-01), Ginn
patent: 1169510 (1916-01-01), Rickard
patent: 1728491 (1929-09-01), Janneson
patent: 2457332 (1948-12-01), Wade et al.
patent: 2527080 (1950-10-01), Rickard et al.
patent: 2804699 (1957-09-01), Robinson
patent: 3013348 (1961-12-01), Casteel
patent: 3514873 (1970-06-01), Stobbe
patent: 3716935 (1973-02-01), Friederichs
patent: 4176474 (1979-12-01), O'Sullivn
patent: 4178700 (1979-12-01), Dickey
patent: 4204341 (1980-05-01), Nowak
patent: 4295832 (1981-10-01), Karell

Affiliated with

Also associated with

Rating

Teaching aids does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Teaching aids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Teaching aids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-118535