Objective. The purpose of this research was to describe the change in performance (achievement and types of representation employed) of students attending a school for deaf people in the city of Cali, after receiving instructions in the use of the assignment algorithm proposed by Nunes and Moreno (1998b). Method. For this purpose, a descriptive study was carried out, in which a pre-test and post-test formula were used, as well as a descriptive comparison with control group. Eight students took part, to form two groups of four members 1