Based on a pilot study at a school where pupils work together exploring a virtual world (Fifth Dimension 5D), the objective of this article is to investigate the potential of software, interaction and integration related to instruction. Foci are set on a conceptual development of a virtual collaborative didactic. More concretely, we explore mediated interaction in collaborative weblogs between pupils managing classroom and computer room congenial problems, tasks and assignments. The objectives and foci are set on development of an integrated didactic on English and computer competence. From a starting point where the design of a virtual learning environment is investigated and developed, the idea of weblogs, agency, instruction and integration is portrayed as a situated approach for operating 5D as a game, a mystery and a challenge. The design of the study has motivated the whole class of pupils, as well as inspired and increased narrative text production.