Purpose: The aim of this study is to investigate how educational researchers work together with practitioners in practical research projects. Design/methodology/approach: Mixed-method. Findings: Our findings suggest that researchers recognize their own limitations as well as those of practitioners and policy makers and learn from collaboration, but that they lack ideas on what activities they can undertake to overcome limitations. Furthermore, educational researchers emphasize the importance of continuous and systematic organized exchange with educational practitioners. We discuss the needs and challenges of educational researchers interacting with educational practitioners during their research. Originality/value: We believe that sustainable research and practice partnerships (RPPs) provide a more effective platform for collaboration between researchers and practitioners. This is because long-term engagement in cross-boundary work within these partnerships promotes the development of new knowledge, routines and methods, thereby improving educational practice. Unfortunately, there are few RPPs in Germany (the context of the researchers interviewed). Consequently, it is critical that funding policies, particularly outside the United States, provide greater support for RPPs and the necessary resources for these partnerships. Even if funding for RPPs is not always possible, our research suggests that short-term collaborative agreements in research-practice projects are preferable to relying on informal transfer channels.