What is Second Life?

http://secondlife.com/

http://secondlife.com/whatis/

Quick Start Guide

SL for Beginners

System Requirements

https://support.secondlife.com/ics/support/default.asp?deptID=4417&task=knowledge&questionID=5198

Support Center

https://support.secondlife.com/ics/support/default.asp?deptID=4417&task=knowledge&questionID=5198

Get Started

http://secondlife.com/ -> Get Started

Complete the registration and download the program

http://secondlifegrid.net/gs/get-started - Step by Step tips

Linden Dollar

http://lindenlab.com/pressroom/general/factsheets/economics

Education in SL

http://secondlifegrid.net/slfe/education-use-virtual-world