Thoughts from a reflective educator.
We had Daanish Ali, the producer of the video below, come to our school and share his film with us (embedded below). I strongly recommend that if you live in an urban centre, you should watch this video. While it talks about water issues in the downtown East Side of Vancouver, I'm sure that similar issues exist in every major city in the world.
It is a great starting place for a discussion about urban water use, and very accessible for your students. Our kids finished watching the video and had some great questions.