Teacher-designed materials are a great way to complement an ELE (Spanish as a Foreign Language) class, making it possible to adapt the syllabus to the needs of a specific group and to update the cultural contents of texbooks. In some EFE (Spanish for Specific Purposes) environments, due to the lack of published resources, material preparation becomes a central task for the teacher, rather than a complementary one. This article presents a list of useful resources for the ‘Spanish for Science and Technology’ class; introduces a practical example of the use of these resources, and reflects on the situation of Spanish teaching in this area.