The pedagogical use of informational communication technology (ICT) in contemporary schools is an important issue in today's era of online learning environments. The internet is constantly evolving and it is transformed from a space of searching for information into a space of content creation and collaboration among users. Web 2.0 applications are being implemented in all levels of education with the intention of enhancing learning and, for countries such as Greece which are new to the use of ICT in the classroom, the learning outcomes are yet to be fully evaluated. This article aims to assess the research about the implementation of Web 2.0 applications in the Greek educational system, in the context of the international bibliography about the use and learning outcomes of Web 2.0.