In classes of 8th grade we started to practice with the shades and gradations in the drawings that will be used for the cover of our folders. You begin to draw a grid of 21 cm to the side and, in each square of 7x7cm, it draws two lines by hand, which can be curved, oblique, vertical, horizontal, wavy or straight. The important thing is that each square has being divided into three areas to be colored. Each student then chose three colors in pencil, in tonal gradation or contrasting each other, to color the different areas. Each zone is colored with a gradient, through a different pressure of the pencil on the paper.