This document discusses issues and trends in materials development for language learning. It defines materials development as both a field of study and a practical undertaking that involves creating materials to facilitate language learning. Some key issues it raises include whether materials should use authentic texts, be driven by theory or market needs, cater to learner expectations, and aim for both language and personal development. Current trends highlighted are a greater use of corpus data, more focus on learner engagement, and increasing localization. The future of materials development is seen as being more personalized, flexible, creative, respectful of learners, and incorporating multicultural perspectives.