Resumen: The main aim of this dissertation is to propose an instructional design which has the form of a didactic unit and the objective to increase students’ participation and motivation in order to improve their interaction and, potentially, their communicative competence. With the intention of accomplishing these aims, I propose the use of the Science Fiction genre as a teaching and learning resource in a 3rd year EFL Classroom of Compulsory Secondary Education. The first part of this paper presents the theoretical framework on which the unit plan proposal is based, namely Communicative Language Teaching, Project-Based Language Learning and Task-Based Language Learning. It also portrays the curricular framework that sustains the Unit plan as well as the methodological design of the dissertation. The second part of the present paper is focused on offering a critical analysis of the Unit plan proposal and portraying its alignment with the Spanish legal framework and, in particular, the Aragonese curriculum.