The purpose of this study is to investigate how preschool teachers document children and what is documented.The questions that we want answered are: What affect do the power of preschool teachers have in the relationship between the preschool teachers and the children during the documentation process? In what way are children involved in the documentation process in preschool? How do the preschool teachers protect the children's integrity when they work with educational documentation? In our theory we have chosen to use Michel Foucault's theory on the concept of power, but we will also use the theories of Åberg & Lenz Taguchi, Lindgren & Sparrman and Juul & Jens who all explain the meaning of integrity and participation while working with the educational documentation in preschool. As method we chose to interview and observe six preschool teachers that work in two different preschools. The preschools are located in two different municipalities in Stockholm.The result of our study showed that educational documentation is a useful tool in preschool, because it provides the opportunity to improve and develop preschool activities. It also provides the opportunity to follow up children’s learning and development. The children should be involved in the educational documentation in preschool and the preschool teachers should always consider the children’s integrity while working with educational documentation. Preschool teachers may however find it difficult to protect the integrity of the children while working with educational documentation.