Patent ID: 7273375
Filing Date: 2007-09-25
Classification: G09B

Abstract:
1. A device for instructing mathematics, comprising: a work surface; a frame around the work surface, the frame defining an abutment boundary for positioning of the movable elements; and a plurality of movable elements, each of the movable elements comprising, on a front surface thereof, at least a portion of a visible mathematical symbol thereon readable via eyesight, each of the movable elements further comprising Braille indicia on the front surface thereof corresponding to the at least a portion of the visible mathematical symbol, each of the movable elements further comprises an attachment member on a rearward surface to attach the moveable element to the work surface, the attachment member being adapted to allow the moveable element to be removed from the work surface and to be slidably positionable to generally any position on the work surface once attached thereto; whereby a plurality of the moveable elements are positioned around at least a portion of a perimeter of the work surface bounded by the frame from which the moveable element can be slid to form a standard mathematical expression.