The document discusses materials development in the Colombian context. It states that materials development has become an important field of study for Colombian teachers as it helps them improve their teaching practices. However, the rationale, benefits and challenges of materials development from the perspective of designers have not been fully explored in Colombia. The document outlines some of the main aspects teachers must consider when designing materials, including understanding the process, benefits and challenges. It concludes that materials development should be further researched and included in language teaching programs, with findings from applying new materials also reported.