Design-Based Research (DBR) is a promising research approach integrating educational theory and practice. The initiation of Didactical Design in Classroom research group (DDC) aims to gather researchers of diverse subjects and disciplines to exchange methodological and theoretical experiences of conducting DBR around didactical approaches to classroom research. The goal is to establish a globally attractive interdisciplinary research hub of expertise and data based on conceptually and methodologically critical and reflective research practice. This collaborative space will involve a discussion of both qualitative and quantitative research methods to study the consequences of DDC interventions for students, teachers and broader educational claims. This is expected to lead to collaborative activities and research such as international webinars, joint teaching in doctoral courses, symposium at conferences and plans for future writing proposals for national and international funding agencies.