I'm not sure how or if I can link this to the correct chapter under the 2012 books section so just posting this here. It's a PPT I made for the second period of teaching this chapter though it can be used anytime really. The first 13 slides are practicing the phrases "Is this your...", "Yes, it is/No, it isn't", "Whose ........ is this", "It's my....../it's mine"
Slide 14 on is a writing exercise/game where the students have to guess who a certain item belongs to from the pictures of the possible owners which are obscured.
I use a lot of animations (possibly too many due to cutting and pasting slides) so delete/edit as needed!