This flipchart is used on a Promethean Board. If you do not have the correct software you will not be able to open it.
This lesson correlates with Everyday Math in first grade for lesson 5-3.
I designed an alligator to eat the bigger playing card. The kids loved the interaction. Use the instructions in the flipchart to guide you. Also visit my blog www.littlepriorities.blogspot.com for more ideas.