INTRODUCTION

This e-book introduces three websites that can be used in education to reduce barriers for a variety of learners.  These websites are considered to be Web 2.0 tools, which emphasize user interactions and collaborations.  On the other hand, Web 1.0 refers to the previous state of the World Wide Web mostly involving content consumers and not content generators.  Therefore, Web 2.0 is the next stage of the World Wide Web's evolution and often involves content that is generated by users and their collaborations online.  

In education, learners can take advantage of such features of Web 2.0 and produce a variety of content online instead of relying on offline resources.  As demonstrated by some of the tools showcased in this e-book, Web 2.0 tools can enhance education and offer valuable supports for students with various barriers to learning.