Here's one I tweeted yesterday, which worked well in class, the picture being one Kim took of graffiti here in the Barrio Gótico in Barcelona.
— Tom Walton (@Tom_IHBCN) March 5, 2015
There just happened to be a class of adults next door to Kim's teens and, the adults' teacher arriving late (!), Kim sent half of her teens next door to ask them what they thought the correct answer was and then report back, while the other half of Kim's class discussed it together.
Fun — and productive, too!
Here's another one, also spotted in the street, which also worked well (also with teens), who had to incorporate the phrases "sad eyes" and "warm hands" into a story:
— Tom Walton (@Tom_IHBCN) March 6, 2015
Having no technology available — no computer in the room, no wifi and no smartphones (!!!) — they used pen and paper, and what's wrong with that?