Software para el aprendizaje de operaciones aritméticas a través del ábaco Cranmer para débiles visuales

This article proposes a software development to help the sightless people learning arithmetic operations using the Cranmer abacus. To create this software was considered that the sightless person could not read the screen; for that reason, it was implemented a screen reader and navigation through the scroll and click, so the person can choose menus and options. It was used the prototypes methodology to improve each one of the versions and adapt them to the needs of the users. The user has to have a Cranmer abacus where he will represent numbers and do arithmetic operations, later through the use of a camera, the software will recognize the numeric values represented in the abacus. The first level is to represent numbers, later the software proposes a series of arithmetic operations, that the user has to solve and use the abacus to represent the result; the software checks if the answer is correct or gives orientation with a voice to help the user respond accurately. There are talking calculators, but this software proposes the learning with the abacus because it allows to develop mathematic skill needed for the sightless people.