How Can Students Best Be Taught About Critical Viewing of Videos

How can students best be taught about critical viewing of videos and other media?

A) Teachers should always identify a purpose for viewing
B) Students can be encouraged to identify stereotypes, lack of multiple perspectives, and gaps in information, just as they do to literature.
C) Teachers can offer a "think aloud" about how they are interpreting the content of the media piece and share their personal connections to it.
D) All of the above.