Online searching on the Internet to know more on an unfamiliar topic is a routine way to identify and access information. From lower secondary school onward, students use the Internet for school assignments instead of books and libraries, for example, when they need to prepare essays or presentations about topics of the subjects taught, such as history and science. Very often, students are confronted with multiple sources of online information that provide different, if not conflicting perspectives, especially about controversial socio-scientific topics (e.g., global warming, nuclear power). Internet is unparalleled for its opportunities to access a huge number of sources on any topic. Undoubtedly, this is an important aspect of the democratization of our current cultural context. At the same time, however, the infinite body of information made available on the potentially global learning environment by a simple click of the mouse, requires new skills to the students, who must be able to locate, select, and evaluate the sources of information and the information itself (