#### Abstract

Our work introduces immersive collaborative learning to geometry education. More specifically, we present a system that uses collaborative augmented reality as a medium for teaching, and uses 3D dynamic geometry to facilitate mathematics and geometry education. Both these aspects are novel to geometry education. We describe improvements in the user interface and visual design of such an application. We also report on practical experiences with using our system for actual teaching of high school students, and present initial quantitative data on the educational value of such an approach.