This article discusses the perceptions of fifth and sixth Primary school teachers about the assessment, use and training of teachers on Digital Didactic Materials (hereinafter MDD). For this purpose, semi-structured interviews have been conducted with teachers from three Autonomous Communities (Galicia, Canarias and Valencia). In this qualitative work the results show that teachers consider it necessary to use this type of resources in the classroom since they are very present in the daily life of the students. They also advocate the creation of their own materials in order to adapt them to the particular characteristics of the group-class, providing a proposal of contextualized teaching and learning. As major difficulties in the design of digital materials, teachers point to the short lifespan of MDD as they must be continuously updated, the amount of time they need to develop them as well as technical limitations to achieve an attractive, coherent and functional end resource. We are dealing with complex work, so there is a need to continue to investigate the perspectives of teachers in the creation and use of MDD in Primary Education.