For some wonderful reason, 3rd grade talks about tessellations in their math core, so this was a no-brainer. After a very fun discussion where we looked at the art of M. C. Escher, we made our own tessellations using some heavy cardstock and then traced them on a large sheet of drawing paper. Then they outlined them with sharpie and created an image out of the shape using colored pencil.
They took some time, but were well worth the work. My favorite part of this project is to see what the students turn their pictures into. Here are a few snap-shots of the tessellations hanging in the art show.