Only if you have been there like a student you will consider some aspects not only to improve user engagement if not to enrich the experience and to design the learning activity and, one of the most important things, to research new ways for learning.
As student you will realize the importance of a previous support to obtain an idea about the activity (aims, details and methodology) that you are required to make into Second Life. You will consider some values and needs to be explain before using, for example, communicative tools from Second Life. Should you explain what is a notecard before using it in your class? Should you give a roadmap about what kind or Slurls or land could be useful to visit for the learning activity? So, would you explain how to use the map and the search before? And maybe you wonder how would you determine the level of knowledge about Second Life of your students and, if doing that how to design the learning activity because Second Life has to be a tool for teaching not the subject of your learning activity.