Diigo lets you do more than just bookmark web pages online. For instance, if you install the Diigo toolbar, or toolbar button, you have the ability to highlight text and pictures in a variety of colors, or add sticky notes to a bookmarked page. With this feature you can annotate web pages with thoughts, ideas or additional information. All these notes are saved for the next time you access the saved bookmark, and anyone else you share the bookmark with, (students or teachers), will also see your annotations. It is a great way to focus attention on a large article.
Diigo lets you take screenshots of bookmarked pages to visually remind yourself of the page content, and archive the page so that if the content changes, or is removed, you will always have the original page that you bookmarked. Saved sites can be tagged for easy searching, organized into lists, or presented as a slideshow. Your Diigo bookmarks can be public, or private, and there are numerous options for sharing with individuals, groups or social networking sites like Twitter or Facebook. A recent iPhone App will even allow you and your students to access stored bookmarks on an iPod Touch in the classroom. With the iPhone app you can download bookmarks for offline browsing. So, you really can achieve a lot by using social bookmarking in education.