I set this video up to practice passive vs active voice by means of 13 multiple choice questions. In some of the questions I picked verbs whose active form already implies sort of a passive meaning, e.g. "accumulate", "surge", "decline", and test whether students can decide between the passive and the active voice. In other questions I gapped passive voice constructs, and again check if students can guess the right form.
I also included some advanced passive constructs, e.g. passive ellipsis: "When exposed to sugar ..." (=when it is exposed to ...), and "is to blame" (=has to be blamed).
Because hearing the well-formed sentences is a huge help for students, I decided to make the task more difficult by mischievously letting the video play on after each gapped sentence to wipe out their hearing memories a bit. :)
I think the biggest merit of such a video-based grammar quiz is to prompt students to pay attention to and notice certain grammar structures, which they may otherwise ignore when simply 'consuming' the content of a video.
Scene summary
This 5-minute TedEd video deals with the causes of cavities and how we can avoid them.
Video genre
Lectures (e.g. TED talks)
Quality not yet verified by the community.
This resource does not contain any images, words or ideas that would upset a reasonable person in any culture.