What is Web 2.0? 

Web 2.0 is the term used to describe World Wide Web sites that reach beyond the technology of earlier websites. 

The '2.0' refers to the second generation of the web. There have been significant advancements in technology since the first generation that are now allowing for collaboration amongst people which was previously limited or non-existent.

There are many Web 2.0 tools that are now being used in classrooms to encourage collaboration of students.