For a week write down everything you watch and where you watched it, for example the TV channel you watched or if it was a website like YouTube, or if it was a DVD or downloaded video. Try not to watch more than you normally would and try to be honest about the times you write down. Ask your parents or guardians to help you write it down or to remind you if you forget.
Download the pdf table for each class member to fill in; and if it helps there is a version with examples partially filled in, to give clues as to what might be included.
After a week, compare your diary with your group. What did you watch that was the same? Did you watch it at the same time?
Many teachers said it would just be "too alarming to find out how much my class watch", However, treat it as a way for a group to start understanding the process of data collection, and at least the class discussion afterwards is bound to be lively!
If we can skip adverts more easily in programmes, how do TV channels pay for making programmes? Have you seen companies advertise in different ways?
Ask pupils to record the time they spend accessing the internet over a week, what they do on the internet and how they access it (computer, mobile, TV, etc)
Ask the class to then spend a week without the internet or moving images. The pupils should log as a diary again. What did they have to do differently etc?