The beauty of experimenting in SL is the fact that, for the most part, resources are unlimited, however the learning curve is a bit steep to get there. But reality is..in my opinion..today's young student has a deep skill set, far beyond what I have that they bring to SL.
I think in order to foster this opportunity to create a rich immersive environment the student should have as few limitations or restrictions placed on him/her in sl. Of course this type of opportunity only is provided in certain discipline areas, and may not work well in all areas. When designing a course in sl the course designer must evaluate whether or not he/she is designing activities that are tied to the learning outcomes of the course. For those who may immersed in SL sometimes it is difficult to remove your personal feelings for the virtual world learning environment and separate it from what is right for the particular course.