Hi Kay:
Movies, stories, examples from thereal world or wrk setting, and similar activities arfe always an interesting and usually enjoable experience that add memorable information to the student. I think it's memorable because students can relate to this kind of information, as if they "already know" the material in a way of speaking.
Adding this as the primary focus, or using it to reengage students who may have lost attention or are distracted by whatever is another reason and use oif this helpful technique.
Regards, Barry