This paper explains what clinical research is and why it is necessary. The author argues that the term ‘clinical’ refers to an academic way of solving practical problems. The author wonders whether clinical research contribute to knowledge for the teaching profession. She suggests that the (tacit) knowledge acquired in classrooms enables researchers to perceive more relevant factors in practice and enables them to understand the problems of teaching better. She concludes that clinical research is a type of action research in the sense that it acknowledges the epistemic function of doing, thus emphasizing the need for integrating scholarship and craftsmanship.