Hi everyone! I found a great web2.0 tool that may be especially useful for teachers in schools with tight security who block websites like YouTube because they fear their students will use it improperly. The site is called Tube Chop and it's a very simple to use application that searches preexisting YouTube videos and then allows you to "chop" or edit the video to the exact length you need. After locating and chopping the video, it gives you the code to embed the video on your blog or on your social networking site and the direct link to the video. I found a 9 minute and 48 second video from the Khan Academy on adding and subtracting fractions which I chopped down to 1 minute and 31 seconds to use as an introductory video for teaching the concept. I have not had the chance to see if my district blocks Tube Chop like they block YouTube but it’s worth a try!