1. The study helps the teachers and the program designers of the visually handicapped pupils to acknowledge the ways concrete manipulatives materiales are used in some activities - that make use of the rest of the senses - to teach and improve some mathematical concepts and skills. | 1. The study helps the teachers and the program designers of the visually handicapped pupils to acknowledge the ways concrete manipulatives materiales are used in some activities - that make use of the rest of the senses - to teach and improve some mathematical concepts and skills. |