What is Web 2.0? It's a term that is thrown around so often in the Educational Technology circles, but what does it actually mean? Basically, it is a collection of web-based online tools that emphasize greater collaboration and interaction between people. It encompasses blogs, wikis, podcasts, social networking, web page creation, video sharing, photo sharing, and technologies that haven't even been invented yet.
Web 2.0 is more than just Internet it is literally a web that connects us through all of the communications devices we carry.
Vicki Davis, http://coolcatteacher.blogspot.com, Coming of Age V2.0
In an educator's world, this means that these tools are used between student and teacher, student and student, teacher and teacher, etc. You can use these tools within your classroom, between 2 or more classes, between grade levels, among schools within a district, it goes on and on.
Web 2.0 tools that have gained popularity over recent years are video sharing and photo sharing sites (YouTube, Flickr), social networking sites (Facebook, MySpace, Twitter), blogs (Blogspot, Edublogs), and wikis (Wikipedia).