Cellphones in Classrooms Land Teachers on Online Video Sites

Videos of teachers that students taped in secrecy are all over online sites like YouTube and MySpace. Angry teachers, enthusiastic teachers, teachers clowning around, singing, and even dancing are captured, usually with camera phones, for the whole world to see.

Some students go so far as to create elaborately edited videos, shot over several days, that use popular soundtracks and sound effects to poke fun at their teachers.

Now, concern is growing among teacher advocates that the proliferation of such videos is causing stress for teachers and some students, and could have a chilling...