4. Presenting a humble contribution in answering the increasing need for large number of studies in the field of mathematics for the visually handicaped. The suggested unit is considered a step towards designing and using precisely measured progams for such students. | 4. Presenting a humble contribution in answering the increasing need for large number of studies in the field of mathematics for the visually handicaped. The suggested unit is considered a step towards designing and using precisely measured progams for such students. |