Answer to question number 3...
"How can virtual worlds like Second Life enhance the teaching and learning experiences for students?"
By creating virtual environments depicting actual environments Second Life offers the possibility of a “next best thing” option when it comes to teaching opportunities. Imagine cardiology students touring a virtual heart or computer science students exploring the inner workings of a computer and experiencing near first hand how the various subsystems interact. The multi media approach – sight, sound, feel and even smell – has been shown to cement complicated subject matter into the brains of students far better than the text book approach.