Online Video Tools

Instead of using Moviemaker, PhotoStory or iMovie, try one of these. They're easy to use and you can post your creations online as well.
Animoto - http://animoto.com/ or http://animoto.com/education for teachers and students
Moviemaker online - http://moviemakeronline.com/
Dvolver - http://www.dfilm.com/live/home.html
Brainshark - http://my.brainshark.com/?tx=gg_adwords&gclid=CI6ogIrh9p0CFQYMDQodZSuCpg
ScreenJelly – great for teacher or student presentation - http://www.screenjelly.com/