Students encounter the concept of scarcity in their daily tasks but have little comprehension as to its meaning or how to deal with the concept of scarcity. Scarcity is really about knowing that often life is 'This OR That' not 'This AND That'. This lesson plan for students in grades K-2 and 3-5 introduces the concept of scarcity by illustrating how time is finite and how life involves a series of choices. Specifically, this lesson teaches students about scarcity and choice: Scarcity means we all have to make choices and all choices involve "costs." Not only do you have to make a choice every minute of the day because of scarcity, but, when making a choice, you have to give up something. This cost is called oppportunity cost. Opportunity cost is defined as the value of the next best thing you would have chosen. It is not the value of all things you could have chosen. Choice gives us 'benefits' and choice gives us 'costs'. Not only do you have to make a choice every minute of the day, because of scarcity, but also, when making a choice, you have to give up something of value (opportunity cost). To be asked to make a choice between 'this toy OR that toy' is difficult for students who want every toy. A goal in life for each of us is to look at our wants, determine our opportunities, and try and make the best choices by weighing the benefits and costs.