I am always impressed when people can explain something without words, or when communication can occur without people knowing the same language. This video does a great job explaining the difference between Web 1.0 and Web 2.0 without any words at all - not even typed words. Essentially, Web 1.0 was designed for individual users to go to websites that they liked and entertain themselves. Web 2.0, on the other hand, was designed for users to interact with and entertain each other. Instead of the consumer needing to seek out information, the information is able to come to them.
This infographic lays out the evolution of online learning pretty clearly. The University of Phoenix went from having 12 students enrolled online in 1989 to now having over 500,000 students. I like Web 2.0 quite a bit for personal use, and when it comes to education, even though I can do SO much more now than I could 5 years ago, I still feel like I have a long way to go in order to really use it efficiently. Technology changes so quickly that it is hard to keep up. I'm kind of hoping it will plateau a little bit so that I can become familiar with even a small amount of what is available. There are some really great tools that I use for my Spanish classes, but I would like to explore more deeply the options I have for using Web 2.0 in my PE classes.