I used my Promethean board to trace all of the converging lines to the vanishing point, which is just above Jesus's head. I think Da Vinci purposely made a striped carpet and checkered ceiling to add more converging lines!
The students were very excited to see this! For those of you who also teach K-6, you know how 6th grader's attitudes are, so I was very happy to be able to impress them.
Next, we looked at some photographs with converging lines on them. We looked at a picture of some railroad tracks, and an aerial view of a city. This time, I let the students find the converging lines. We traced them until we got to the vanishing point. In the city photograph, the vanishing point was off the edge of the page.
Next, the students made their own perspective pictures of an aerial view of a city. I let the students choose if they wanted to make a realistic city, with details such as windows on the buildings, or if they wanted to make an abstract city that was basically colored 3-D boxes. If the students wanted their vanishing point to be off of the edge of the page, we attached a Post-It note to the edge of the paper, and drew the dot on that. The students used crayons for small details and lines, and painted large areas with watercolors. Here are some student examples: