I gave them a palette of the primary colors, red, yellow and blue. I also gave them a pre mixed brown for the center of their palette, just like a color wheel. The first part of the lesson we painted the trunk and branches of the tree. I had them paint large to fit the paper, and tried to achieve a more curvy trunk, unlike the straight pine tree trunk.
A first grade art standard for First Grade is mixing a secondary color with 2 primary colors. I had them first mix an orange. Each of the students had a small sponge in an almond or leaf shape. I had them paint different shades of yellow, orange and red onto their sponge and print the leaves around the tree. I also had them mix green.