Monochromatic or analogous colors for the background. Darkest colors at the top, changing to lightest. Once painted and dried, went over with black tempera paint to create a silhouette of a tree. They needed at least 5 combinations of colors varying from dark to light for swirls. Then start adding them in layers (D to L)from the top of the sky, middle, to the bottom. They chose contrasting color combination for the foreground and tree branches. Last, gold paint to show direction of light
Another great idea for teaching value using shades and tints. The original poster of this project, art teacher Jessica Young, gives a great explanation of the steps and tips she used with her fourth-grade students.