These are posters (8.5"x11") that represent order of operations. They use the common hierarchy of the face cards in a deck of playing cards to communicate the hierarchy of mathematical operations. Ace corresponds with Parentheses. King corresponds with Exponents. Queen corresponds with Mutliplication/Division. Jack corresponds with Addition/Subtraction. The Multiplication/Division and Addition/Subtraction include "left-to-right" arrows to communicate the importance of evaluating expressions from left to right.