VSim facilitates the real-time exploration of highly detailed, three-dimensional computer models in both formal and informal educational settings. Beyond real-time interaction with three-dimensional content, this NEH-funded software offers two critical functions for academic use of interactive computer models: the narrative feature allows users to create linear presentations within the virtual space (akin to PowerPoint or Prezi within a three-dimensional world), and the embedded resource section allows users to embed within the virtual space annotations and links to primary and secondary resources about the modeled environment.