**Highlight Equivalence**

Turn on this feature to set the background color of equivalent expressions or equations to be the same color.

*Examples:*

**Simplifying an expression.**
On the left side of the image, the student first tries to simplify, but makes a mistake in the first
step and the student gets feedback because the expressions are different colors. On
the right side of the image the student corrects the mistake and continues. The student gets feedback that
no mistake has been made because all three expressions have the same background color.

**Solving an equation.**
On the left side of the image the student tries to solve the equation, but makes a mistake in the
first step and the student gets feedback because the expressions are different colors.
On the right side of the image the student corrects the mistake and continues. The student gets feedback
that no mistake has been made because all three equations have the same background color.