WHAT WERE YOU DOING WHEN YOU TOOK THE PHOTO?
Watching old photos or videos is a great way of bringing back memories as well as practising the past tenses.
Moreover, if you practice with a friend who speaks English too, then, you can speak about the old times and the fun will be double!
But first you need to warm up with this activity:
Read the theory.
Do exercises:
Now you are ready to try this activity talking about what you were doing and what your life was like when you saw a favourite film, for example, this scene from Grease: