The aim of this paper is to discuss whether it is possible to use the theories about the Zone of Proximal Development as understanding the value of using tools in action research as a way to challenge teacher’s thinking and acting in practice. Vygotskij’s theories are enlightened in a group perspective of learning and are applied in a school development context. In the project three tools are introduced; shadowing, writing, and facilitating. The argumentation is focusing the importance of using a variation of tools and taking different roles in a changing process; the person who gives and receives response concerning their own practice.