In showing method audiovisual methods such as television, videotapes and films are used. This is the most effective means of providing real world conditions and situations in a short time. One advantage is that the presentation is the same no matter how many times it's played. This is not true with lectures, which can change as the speaker is changed or can be influenced by outside constraints. The major flaw with the audiovisual method is that it does not allow for questions and interactions with the speaker, nor does it allow for changes in the presentation for different audiences.
Some times presentations can be considered, according to showing method; but the presentations are combination of verbal and displaying or showing methods