Lots of products including the open source Writeboard
Amazing blog with more than you need to know on ITC and nifty tools for teaching
Ten years ago Marc Prensky coined the term ‘Digital Native’ to define our students. He argued that they were born into a world which embraced technology and that technology was embedded into their lives completely. Teachers, no matter how hard they tried, could not be more than ‘Digital Immigrants.’
Wiki How article on starting out in instructional design - eLearning and online education and training