Diigo
Diigo is the first tool I turn to for collaborative research. It is one of the kings of social book-marking and offers some fantastic features. Diigo can be accessed using Google, Facebook, Twitter or Yahoo accounts, or you can create you own Diigo account. It also offers free educators accounts, which allow you to automatically set up student accounts and classes.When I use Diigo, I create a Library for that topic and then add my students to that library (made easier by the education accounts). Students then research the topic and add bookmarks to the library.
Diigo also allows for students to highlight text on a website, and add annotations. These highlights and annotations are also added to the library. All members of the library can access the bookmarks, highlights and annotations. In addition they can add comments, and 'like' bookmarks. The highlighter is especially useful as it supports note-taking methods.
Diigo offers browser tools that make this process almost painless. It also offers many other features such as tag clouds, library searches, screen captures, read-it-later services, and web-based notes.
I love Diigo, but the amount of time needed for set-up and familiarisation means that it is best suited for long reseach tasks.
Pros: Many features; extensive collaboration; highlighting supports note taking techniques, tagging
Cons: A bit of set-up is required; students require accounts; familiarisation required
Pearltrees
Pearltrees is an interesting take on social book-marking. When you bookmark in Pearltrees you place those bookmarks in within a tree diagram. This allows you to categorise your bookmarks as you go along.The nature of Pearltrees puts it somewhere between brainstorming and researching. These features, combined with it's collaboration ability, provides many classroom opportunities. For example, a new pearl could be created and shared with the class for a brainstorming storming session. Students can then assess the brainstorming results to distil a group of topics to research. Then the students can then research the topics adding the bookmarks to the Pearltree.
You can access Pearltrees with a Google, Facebook, or Twitter account, or you can create a Pearltrees account. Pearltrees has a browser tool (Pearler) that makes it easier to add pearls to your tree. Pearls are really easy to move around and copy.
Peartrees looks great and really helps students visualise relationships. It could work well for general research and for tasks where categorising is important.
Pros: Visually appealing; collaborative; categorising
Cons: A bit of set-up is required; students require accounts; familiarisation required; no highlighting
Padlet
Padlet (formerly Wallwisher) may be the least powerful of these tools, but it makes up for that in it's ease of use and speed of set-up. Padlet is essentially an online post-it board where people can add virtual post-it notes.It is brilliant for a quick brainstorm, but it's ability to post URLs (web links) to it means that it can also be used to research. When you add a URL to the wall, Padlet embeds the relevant info from that page and adds it to the post-it.
Padlet doesn't have any of the more powerful features, and the wall can get quite crowded, so it's really not suited for any serious research. Never-the-less, you can go from having nothing to have student collaboratively posting research on-line in less than an minute. Just go to padlet, click create wall, type a title, and give the students the URL for the page.
Padlet doesn't require you to have an account to create or use walls, although having an account makes sure you never loose your walls. Log in using your Google account, or create a Padlet account. The best thing is, students will not need an account, you just give them the URL.
Padlet is a gem for quick research, or to expand on that 'techable moment'.
Pros: Realtime collaborative; quick; no accounts required
Cons: Few features; gets crowded