There are some nice charts/diagrams that show the difference between web 1.0, 2.0, 3.0 and beyond in this presentation. I am not sure if teachers, or even if most technology specialists for that matter can explain the difference.?? I know that I might have a hard time trying to put it in to words.?? The question is, how will the change to web 3.0, particularly the use of small portable computing devices, affect the way teaching and learning happens.