Tessellations are pretty cool! They are congruent shapes that fill a space in a pattern, with no gaps or overlapping. In other words, they fit together like a puzzle. I’ve been doing these simple slide tessellations for a couple of years now. After we create the shapes using cardstock paper, students try to turn their abstract shape into a recognizable form. Some kids are great at this step while others need some help from their peers. Once the shape is tessellated on the paper, students use Sharpie markers to outline and either watercolor pencils or colored pencils for color.