Television.

Television and video tape:

-video is the display of the recorded pictures on a television screen.

-moving images are recorded on video tapes.

-video tapes store and display moving images accompanied by sound.

-certain special effects such as slow motion and still image are available.

Principles for using video:

-check lightning,seating,and volume controls beforehand.

-prepare students by reviewing previously learned content and ask new questions.

-stop the videotape at appropriate points for discussion.

-highlight major points by writing.

Advantanges:

-motion

-real-life experience

-repetition

Limitations of video

-fixed pace

-scheduling

p/s : dont bother searching for picture.i know you have seen one of it.=)