Animoto is a web 2.0 tool where the user creates videos from still images, text and video clips.   It is a quick and easy site to use and they have unlimited videos for teachers and their students.  If you haven't tried this site then today should be the day.  You will be impressed with how easy it is to create.

Prezi is a presentation tool and another option for students or teachers other then powerpoint.  Give prezi a try in your classroom.