Emergency Sub Plan or an Easy Art Elements Art Activity! A student-tested, quick Middle School or High School Sub lesson plan with everything ready to go! I came up with this art activity when I needed to take a day unexpectedly. We were in the middle of our Art Elements Review, so this lesson worked out great because it uses Line, Color, Shape, and Positive and Negative space as well as the Design Principles: Repetition, Unity, and Balance.This lesson is easy, yet concept-rich enough to be use