Assessment is central to learning, yet often in awkward tension with constructivist pedagogy. It is a source of frequently negative emotions, which actively inhibit the reflection needed to make it an effective part of the learning process. By casting assessment as a fictitious place - 'Assessment Island' - populated by a range of characters, objects, and landmarks that illustrate the many influences on the process, this 3D game-like environment can reveal sources of insight into assessment, both through telling stories with other learners, and through dialogue with representations of other aspects of the process.