Other
Color Theory and Mixing: 16 Lessons in Color Theory
Complete site on using color in art. Includes the history of color, psychology of color, color perspective, and how color changes depending on the medium used. Includes activities to help understand how to use color in your art.
Other
Color Theory: Lesson Plans
This site was created by an art teacher and has several fun lesson plans that could be adapted to different grade levels. The activities are about color wheels, color theory, tints and shades, and several other subjects.
PBS
Pbs Kids: Coloring Pages and Activities
Younger students can learn how to color within the lines using these printouts inspired by their favorite PBS shows. There are also games, too, such as connect-the-dots.
Arizona State University
Arizona State Univ.: The Art of Illustrator Eric Carle
This site from the Arizona State University contains a lesson plan for first grade art or reading teachers. Introduces students to the concept of "Warm and cool colors." Students use the art of Eric Carle as inspiration to create their...
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Mixing Primary Colors
Primary elementary lesson plan about primary colors. One rainbow activity and one blending activity.