With the purpose of proposing new mechanisms and instruments in the teaching of the physics this document it seeks to disclose the Interactive physical pretender STEP, created ambient first floor GNU/Linux (open code), for the group The KDE Education Project (Kde-Edu) and modified and implemented (under the authorization and cooperation of Kde-Edu) for the group of investigate-cion Colombian Fisinfor, because with the purpose of being able to understand and to explain the physical sciences the appropriate handling of different aspects it is required like they are it: the verbal and mathematical language, the laboratory implements, application, handling and development of new didactic tools as application, fislet (physlet) and educational software.