“…This proposal aims to acknowledge the importance of the changes in three registers (algebraic, numeric, and graphic: "rule of three" ;Janvier 1987;Artigue 1992;Fisher 1997Fisher , 2001Fisher , 2011a, the modeling approach Rodríguez 2015), and the effective use of technology in the teaching/learning process of DE (Rodríguez and Quiroz 2015). We also incorporate a fourth register, the verbal (word problems: "rule of four"; Fisher 1997), and in the last years, we have recognized the importance of dealing with "reality" through physical experiments (such as building an electric circuit; Rodríguez 2015) and the effective use of technology in the teaching/learning process of DE (Rodríguez and Quiroz 2015) or a simulated "reality" through the use of simulators.…”