Evidence-based intervention programs have become highly important in recent years, especially in educational contexts. However, transferring these programs into practice and into the wider field of public policy often fails. As a consequence, the field of implementation research has emerged, several implementation frameworks have been developed, and implementation studies conducted. However, intervention research and implementation research have not yet been connected systematically and different traditions and research groups are involved. Implementation researchers are mostly given mandates by politicians to take on the implementation of already existing interventions. This might be one of the key reasons why there are still many problems in translating programs into widespread community practice. In this paper, we argue for a systematic integration of intervention and implementation research (“I3-Approach”) and recommend a six-step procedure (PASCIT). This requires researchers to design and develop intervention programs using a field-oriented and participative approach. In particular, the perspective of policymakers has to be included as well as an analysis of which factors support or hinder evidence-based policy in contrast to opinion-based policy. How this systematic connection between intervention and implementation research can be realized, is illustrated by means of the development and implementation of the ViSC school program, which intends to reduce aggressive behavior and bullying and to foster social and intercultural competencies.