Using the book The Doorbell Rang to teach scarcity. The children have 12 cookies and each time the doorbell rings they have to keep splitting the cookies. After each page a student will come up and try to split the cookies equally. This continues till the last page where they are faced with a scarcity problem. If more children arrive they will not have enough. Thankfully grandma arrives with more cookies! You can teach the concept of scarcity using this book because there is a small amount of cookies to share with all the children.