Training professionals to design and produce interactive systems requires the use of well thought-out training scenarios. Indeed, it is essential to consider pedagogical forms whose objective is providing learners with field experience. It is also necessary to motivate learners to learn about subjects that sometimes seem distant from their immediate concerns and to renew their interest in these subjects. This article presents a tool, called GRASP, that helps design pedagogical devices. This tool was first evaluated through three educational initiatives implemented in two universities in the north of France. These initiatives were analyzed to enhance the tool. Then, a second evaluation was conducted to validate the tool more widely. The first part of this article presents the scientific context. Then the design tool, the evaluation protocol, and the three devices built using this tool and their evaluation are introduced. Some of the lessons learned during the initiatives are described. Next, the second evaluation, conducted with more teachers, is presented. Finally, the conclusion highlights the perspectives opened by these initiatives. (Contains 12 figures, 9 tables and 6 footnotes.)