The study in this paper aims to contribute knowledge about what characterizes STREAM didaktik in preschoolbased on a theory-informed teaching arrangement in an ULF2 network. The study is guided by the question:What can characterize STREAM didaktik in preschool with a focus on literac/y/(ies) in what and who/whichquestions? Theoretically, the study is connected to three main concepts: STREAM, didaktik and literacy. Thematerial consists of 85 documents, totalling 14, 200 words and 2.5 hours of film focusing on planning andconducting teaching in preschool. The knowledge contribution is: 1) STREAM didaktik with literacy(s) in focusappears as a relation between general didaktik and subject didaktik in preschool, 2) STREAM didaktik withliteracy(s) in focus can also be seen as a bridge between opening to the unknown and searching for the knownin a movement between planned and spontaneous teaching in preschool, and 3) STREAM didaktik with focuson literacy(s) in what and who/which questions can be tried in terms of STREAM actors.