This article examines floor management in two classroom sessions: a task-oriented computer lesson and a literature lesson. Recordings made in the computer lesson show the organization of floor when a task is given to students. Temporary or "incipient" side floors (Jones and Thornborrow, 2004) emerge beside the main floor. In the literature lesson, a permanent side floor is established by Turkish-German bilinguals alongside the main floor. To describe this type of floor, the term "tangential floor" is proposed. An analysis of turns in the two lessons reveals that the code-switching by the bilinguals contributes to the shaping and unfolding of floor. In the literature lesson, they use German in the tangential floor, but use more Turkish, with a few code-switching episodes, in the task-oriented computer lesson. (Contains 2 tables.)