" The 21st century calls for knowledge workers who can effectively utilize the vast array of information that resides on the internet and who are capable of processing the information collaboratively with others. Project-based learning is an effective way to cultivate the skills of finding, organizing, synthesizing, and presenting information, as well as the social skills of working in groups, all of which are necessary in the knowledge-based economy. Diigo is the perfect tool for this kind of exploratory and collaborative learning.

Diigo is an effective tool for teaching as well. Diigo's features allow teachers to highlight critical features within text and images on web pages, to collect and organize series of web pages and web sites into coherent and thematic sets, and to facilitate online conversations within the context of the materials themselves. Diigo also allows teachers to collaborate and share resources among themselves.

Diigo is much more than a simple web annotation or social bookmarking service -- it is a new kind of online research and collaborative research tool that integrates tags and folders, highlighting and clipping, sticky notes, and group-based collaboration, enabling a whole new process of online knowledge management, learning, and teaching in the information age."