7th grade students have created works of art using Balance and Symmetry to create Mask like images and Notan.  

NOTAN

A Japanese design concept involving the play and placement of light and dark elements as they are placed next to the other in the composition of art and imagery.  
Notan literally means "light dark harmony". Artists use "notan studies" to explore different arrangements of light and dark elements without having the distraction of other elements like color, texture and finer details.

SYMMETRY

Symmetry is a mathematical operation, or transformation, that results in the same figure as the original figure (or its mirror image). It is everywhere, in the sciences, in the arts, in architecture, in nature, and in our everyday life.
The term symmetry is used both in the arts and in the sciences.
In art, symmetry is often used as an aesthetic element. It is often used, to mean a kind of balance in which the corresponding parts are not necessarily alike but only similar.
Generally is a balance between various parts of an object.

BALANCE

Balance refers to the overall distribution of visual weight in a composition. A well-balanced composition feels comfortable to look at.
Balance is one of the principles of art and design. The principles deal with how the elements of art are arranged in a work of art. In essence, the principles of art deal heavily with composition. Visual weight balances around an artwork’s axis. The axis may be vertical, in which visual elements balance on both sides of the axis. Artworks may also balance around a horizontal axis, in which visual elements balance from top to bottom.
There are three types of balance: symmetric, asymmetric and radial.