Turning educational ideas into meaningful learning requires planning for uncertainty. This article presents Bakhtin's key concept of "eventness" as an essential aspect of defining dialogic space. To Bakhtin an event is something happening here and now, with a degree of open-ended uncertainty tied to what will happen next. Acknowledging this uncertainty--or eventness--might help researchers and practitioners grasp and support the spirit of dialogue in activities aiming for genuine student participation, which is a core concept in recent curricular reforms in Norway. This article discusses eventness as a hub for dialogic principles, illustrated by examples from student group conversations on literature in Norwegian lower secondary school. The challenge of "creating" dialogic space is discussed with reference to Bakhtin's general idea of authorship.