I created this list of Art Elements and Principles with each word illustrating it’s meaning so students could intuitively understand what each means.
I have also found that most color wheels are either too complicated (lots of sections and subsections) or too simple (three overlapping balloons) for your average elementary student. I made a set of pages that simply illustrate primary, secondary, warm, cool and complementary colors.
This pdf contains:
Pg 1: Art Elements: Line, Color, Value
Pg 2: Art Elements: Shape, Form, Texture, Space
Pg 3: Principles: Emphasis, Balance, Rhythm, Harmony
Pg 4: Principles: Pattern, Contrast, Proportion, Unity, Variety
Pg 5: Color Wheel
Pg 6: Primary Colors
Pg 7: Secondary Colors
Pg 8: Warm Colors
Pg 9: Cool Colors
Pg 10-12: Complementary Colors
Pg 13: All Elements page
Pg 14: All Principles page
Pg 15: All Color Theory page