Students use their math skills to create op art! First, have students come up with a measurement for their line spacing between their parallel lines. The example has a 1/2 inch gap between each line. After students draw their parallel lines with a ruler, they choose five polygons to include in their composition. They draw their shapes using a ruler. Once their shapes are drawn, they create an AB pattern using two different colored markers, coloring around their shapes. Then, they go back and color their shapes to create an optical illusion! (see example).