Edusim is a Cave Automatic Virtual Environment "Immersive Touch" 3D Natural User Interface (NUI) based concept of lesson driven (multi-user) 3D virtual worlds on the classroom interactive whiteboard or classroom interactive surface. The Edusim concept is demonstrated by the Edusim free and open source multi-user 3D Open Cobalt virtual world platform and authoring tool kit modified for the classroom interactive whiteboard or surface.