Here's something from Twitter which I "liked" and which gets funnier and funnier (ok, it may be hysteria 😉 !) the nearer it gets to the end of term:
How all teachers feel towards the end of the quarter…😱 #TeacherLife pic.twitter.com/4HYJi4kWkf
— TES Teach Blendspace (@tes_teach) November 4, 2016
That's not really one for class (unless you're in teacher training, perhaps) but here's one I'd wager would go down in the right kind of class:
I can picture a class I used to have laughing at it and then getting into a very serious discussion on the topic of "men" (they were all ladies, you understand 😉 !)
On a more serious note, the Visual Arts Circle looks like an interesting initiative and this, on visual literacy in language teaching is a long but interesting read.