The Finnish social pedagogical curriculum for early childhood education directs early childhood teachers to use documentation to assess and develop pedagogy and practise. This empirical study examines the challenges and benefits a group of Finnish preschool teachers experienced when they learned to document their work. Although the idea of documenting appears fine in theory, and international experiences of constructing child-centered pedagogy through documents are promoted in the literature, accomplishing this task successfully is challenging in practise. In this study, as the features of documentation in early childhood education and care practise were considered critically, ideological discord was found within the national and local policy-making process, including problems with pedagogical leadership, which reduced the power of documentation in practise. However, the study also revealed that using documentation empowered the teachers as professionals, helped them communicate with parents and children, and guided them to focus on the children's views.