One way in which TV commercials can be used in the ESL classroom is to provide students with a visual prompt for storytelling.
Many TV commercials tell a mini-story. Due to the usual 30-second time constraint, these stories tend to be very compacted and often have little or no spoken English in them. When re-telling the story, learners must fill-in the missing information by using language of their own creation.
When right commercials are used, this can be a wonderful learning activity.
Here are some commercials that you can use in your classroom.