The document summarizes a comparison of the 3D virtual world Second Life and the learning management system Moodle as platforms for technology-rich learning environments. It provides an overview of how 3D virtual environments can support learning through collaboration and visualization. While Second Life allows for simulating real-life experiences, Moodle provides standard learning tools. The document concludes with guidelines on when 3D virtual environments are best suited for learning based on approaches like social constructivism and hardware requirements.