But bookmarking with your Web browser has its limitations. For one thing, you’re saving your bookmarks only on your computer. If you’re using a desktop PC in your classroom, that means you can’t bring your bookmark collection with you when you go home or elsewhere; it also means you can’t share your favorite bookmarks with your colleagues very easily. Meanwhile, categorizing bookmarks has its limitations. Sure, you can organize them into neat little folders for each class you teach, but it’s not like you can tag them with relevant keywords or jot down some notes about each website very easily.That’s where del.icio.us comes in. del.icio.us (yes, it’s pronounced “delicious,” and written in lower case) is a community bookmarking tool. By “community,” I mean the entire online community - everyone with Internet access. del.icio.us allows you to share your bookmarks with the entire world, accessible from any online computer.
To learn about this 'cool tool' and how to use it, read the whole post from Andy Carvin at Learning.now