I LOVE THIS POWERPOINT!! I created it from a Marilyn Burns activity in one of her books, but the Powerpoint is all my creation. Students LOVE this activity, where they are told a story about a couple opening a restaurant, and attempting to open their restaurant for banquet style seating, but are not sure how many people they can seat. This is a great introduction to Algebra. Our fifth graders don't even realize they are doing algebra until the slide show tells them they are!