Education and demonstration – Mathematics – Arithmetic
Patent
1980-12-03
1982-11-09
Grieb, William H.
Education and demonstration
Mathematics
Arithmetic
434202, 434335, G09B 1902
Patent
active
043582737
ABSTRACT:
An electronic self-study device in which problems are randomly generated comprises input keys by means of which a user inputs an answer to a displayed problem, and a review key which is depressed by a user to again display a problem incorrectly answered by the user. The device includes a judging means which judges whether or not the answer inputted by the user is correct, and a problem storing means is responsive to the judging means for storing a problem to which a wrong answer has been inputted. Further provided is a problem read-out control device which is responsive to operation of the reviewing key for causing the problem to which an incorrect answer was given to again be displayed so that the user may again answer the problem to which an incorrect answer has been given. According to a further aspect of the invention, a plurality of problems is displayed and, responsive to operation of the reviewing key, the incorrectly answered problems are sequentially read out of the problem storing means so that the user can again answer the incorrectly solved problem.
REFERENCES:
patent: 2965975 (1960-12-01), Briggs
patent: 3947976 (1976-04-01), Hafel
patent: 3974575 (1976-08-01), Duncan
patent: 4179822 (1979-12-01), Clark
Casio Computer Co. Ltd.
Grieb William H.
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