Red is my favorite color.  It is known for being at the end of the visible spectrum of light.
Isn't the color red supposed to excite and inflame the passions?
Yes that is true.  I've also heard it increases blood pressure!
I understand it is not to be used, or used sparingly in classrooms.
I have never heard that?  Where did you read that?
Teacher school!
Interesting fact, Iron oxide is what gives Mars the red color.