How do Danish teachers talk about their observations?

In Danish contexts, lesson studies constitute a completely new and challengingapproach to teachers´ professional development and not all teachers see its potentials at the outset. Therefore, we strive to identify decisive factors that are necessary for the participating teachers to experience taking advantage of their participation. Of the three basic features of lesson studies: planning, observation and reflection, it is in the reflection that teachers must experience in-depth discussions based on planning and observations thus gaining new understandings of their teaching practices and student learning.