Science_afficionado writes "An engineering grad student at Vanderbilt has developed an app for Android tablets equipped with haptic feedback that turns them into a valuable tool for teaching mathematics and other STEM subjects to visually impaired students. 'Gorlewicz has programmed these tablets so they vibrate or generate a specific tone when the student’s fingertip touches a line, curve or shape displayed on the screen. The devices can generate vibrations with a number of different frequencies and hundreds of different sounds. This allows Gorlewicz to assign different tactile or audio signals to different features. For example, in an exercise that includes an X-Y grid, she can set the horizontal and vertical lines to vibrate at different frequencies and set points to make a certain tone. In this way, it’s easier for the students to distinguish between the gridlines and the points on the grid.'"
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