The social part of social bookmarking works like this: you can share your links that you've saved through a service like Diigo with anyone else who uses Diigo. You can also use Diigo to see the interesting links that your friends and other people bookmark - this can be extremely useful for a team of teachers who like to share teaching resources.
"Each one of the "gems" listed here was recommended by an educator or someone who works in this field (or me!). They were selected as ones that are perhaps not as widely known as the Big Rocks like Flickr, del.icio.us, etc. Your goal here is not to analyze them all, just find one quickly that piques your interest. "
Core Routines
The core routines are a set of seven or so routines that target different types of thinking from across the modules. These routines are easy to get started with and are commonly found in Visible Thinking teachers' toolkits. Try getting started with with one of these routines.
What Makes You Say That? Interpretation with justification routine
Think Puzzle Explore A routine that sets the stage for deeper inquiry
Think Pair Share A routine for active reasoning and explanation
Circle of Viewpoints A routine for exploring diverse perspectives
I used to Think... Now I think... A routine for reflecting on how and why our thinking has changed
See Think Wonder A routine for exploring works of art and other
interesting things
Compass Points A routine for examining propositions
"I've previously posted about the Bloom's Taxonomy of Reflection that Peter Pappas developed. I just discovered that he developed this excellent Prezi about it. I'd also strongly encourage you to read his post that explains it further, as well as one by Langwitches giving an example of how to apply it in the classroom."
Teachers are finding new ways to use Twitter to engage their students, build stronger academic and professional relationships, and to share information in a richer learning environment, and they are using tools like these to bring more fun and functionality to the process.