The aim of this paper lies in the theory and practice integration on interventions, from the assumption that this combination is a foundational category on initial and continuing training, facilitated by online environments. Thus, at the beginning of the text, we deal with teachers' initial training and the theory and practice integration in the face-to-face and distance modes. We then approach teachers' continuing training under the perspective of integration through online environments. In the next topic we deal with a methodological design and design-based research, which guides a study on the theory and practice integration in a specific context of continuing training in an online environment. And in the end, the analysis' results bring teachers' reflections on the choice and evaluation of digital learning materials in the context of their own practice.