There are a couple of great meme making websites out there. I think it makes a great lesson Starter or Plenary to get the class producing a meme.
It could be a funny way of summarizing the main ideas in the lesson, or a thought provoking way to get the class to project one of the concepts from the lesson. As a starter it could be something that gives a clue to the students about the topic of todays lesson.
Obviously there is also great capacity for this in other subjects such as Maths, Languages and Science.
Some websites making memes are: