I used the expression squares to make flash cards. The flash cards can be used for a number of activities: a matching game to identify expressions with the same base, a memory matching game, a partner activity to combine the expressions. Students each have several of the flash cards as their deck of cards. With a partner, they combine their expressions to create a new expression. They then have to simplify the team expression to find the final answer with only one exponent. This is a great activity to review and practice two exponent rules while also using social interactions in a small or large group.