The Ice Cream Stand
Students will learn about supply, demand, price, competition, and entrepreneurial skills in this lesson. They will put what they learned into action by creating an ice cream stand, to complete with other stands in the classroom.
KEY CONCEPTS
Competition, Demand, Entrepreneurship, Price, Scarcity, Shortage, Supply, Surplus
STUDENTS WILL
 Explain the concepts of supply and demand.
 Explain how shortages and surpluses affect prices.
 Explain how prices and quantity of products produced are determined.
 Create an ice cream stand which will compete with other ice cream stands in the classroom vying for business and trying to make money.
INTRODUCTION
Tell the students that they will learn about the economic principles of supply, demand, price, and competition. They will read two articles describing examples of supply and demand, and the effect of supply and demand on prices. To conclude the lesson, the students will work in groups to create an ice cream stands which will sell sundaes and milkshakes. Since each group will not have enough ingredients to run its stand successfully, they will have to develop a plan to get the supplies they need from other groups. The goal for each group is to make the best sundaes and milkshakes they can at a competitive price which will turn a profit. Thus, keeping costs down is quite important. A group of adults will buy one sundae and one milkshake from each of the competing groups. Groups will be judged by the quality of the ice cream stand and the quality of the sundae and the milkshake.
MATERIALS

Appendix Graph: This will be used to help students determine how market price is established.
Appendix

Review of the Laws of Supply and Demand: This site reviews the laws of supply and demand.
www.curriculumlink.org/econ/materials/sdlaws.html

Economics Basics: Demand and Supply: This site uses graphs and charts to explain supply and demand in greater detail.
www.investopedia.com/university/economics/economics3.asp

Market Price Definition: This site explains the concept of market price.
www.answers.com/topic/marketprice

Empty Seats Make Yankees Cut Some Premium Prices: This site explains why the New York Yankees had trouble selling their premium seats.
blog.taragana.com/n/newyorkyankeescutsomepremiumticketpricesbecauseofemptyseatsatnewstadium42809/

Morrows Dump Milk To Protest Low Price: This site explains why farmers were dumping milk instead of selling it.
www.msnbc.msn.com/id/30930477/ns/businessus_business/t/worldmilkglutsqueezesfarmersconsumers/#.UORjsbuXSlo

EconEdLink Lessons: These are two great EconEdLink lessons that teachers can refer to or use for the concepts of supply and demand.

"Demand Shifters":
www.econedlink.org/lessons/index.php?lid=550&type=educator 
"The Prices are Changing":
www.econedlink.org/lessons/index.php?lid=747&type=educator

"Demand Shifters":
PROCESS
You will need the following materials for this lesson:
 Play money in small, easily dividable denominations
 2 sets of markers
 Construction paper
 6 quarts or half gallons of ice cream
 2 bottles of caramel toppings
 4 pints of milk
 3 blenders for the milkshakes
 1 package of cups which can be divided up as needed
 1 package of bowls which can be divided up as needed
 1 package of spoons which can be divided up as needed
 1 package of napkins which can be divided up as needed
 1 box of straws which can be divided up as needed
 3 ice cream scoopers
 3 bottles of chocolate syrup
 Straws
Begin the lesson by asking the students the following questions:
1. List five items you would like to buy if you had enough money to buy them.
2. List five items you would like to sell if you could find a buyer for these items.
3. How do you think the price for an item is established?
4. How do the producers of various items decide how many of the items to produce?
Begin the demand portion of the lesson by asking students how many World Series tickets they would be willing to buy at $20.00 each? How many would they be willing to buy at $50.00 each? At $100.00 each? At $500.00 each?
1. Ask the students what happens to the amount of something they want to buy when its price goes up. [Usually, they will buy less of that product. Feel free to use examples.]
2. Ask the students what happens to quantity demanded as the price rises. [Quantity demanded drops as price increases.]
3. Ask the students to describe the relationship between quantity demanded and price. [Demand for most products is sensitive to price. As prices rises, quantity demanded falls. For most items, in other words, there is an inverse relationship between price and quantity demanded. You may want to plot the data on a demand graph.]
4. Introduce the New York Yankees example. Discuss the difficulty the Yankees have had selling their premium seats in the new stadium (some seats cost several thousand of dollars). Have the students read the article Empty Seats Make Yankees Cut Some Premium Prices .
Now it is time to move to the supply portion of the lesson.
1. Ask the students how many of them would be willing to babysit for $1.00 an hour? For $5.00 an hour? For $10.00 an hour? For $20.00 an hour? [You may want to plot the data on a supply graph.]
2. Ask the students what the relationship is between quantity supplied (of babysitting labor, for example) and price. [There is a direct relationship between quantity supplied and price. As price rises, quantity supplied goes up, and vice versa.]
3. Ask the students if it makes sense to sell a product for less than the supplier paid for it. [Usually, this wouldn't make sense the supplier would be losing money.]
4. Have the students read the article Economics Basics: Demand and Supply to review the principles of supply and demand.
Now tell the students that they will determine how market price is established.
1. Let's assume that at 40 cents a bottle students demand 100 bottles of soda (pop). At $1.00 a bottle, students, demand 75 bottles. At $2.00 a bottle, students demand 30 bottles. At $5.00 a bottle, students demand 2 bottles. Place this data on the graph in the Appendix.
2. Let's assume that at 40 cents a bottle, suppliers would provide no soda. At $1.00 a bottle, supplies would provide 75 bottles. At $2.00 a bottle, suppliers would provide 250 bottles. At $5.00 a bottle, suppliers would provide 500 bottles. Place this data on the graph in the Appendix.
3. After you connect the dots for demand and supply, the graph will show the market clearing price or the market equilibrium price. This is where quantity demanded equals quantity supplied. The market is cleared at this price. If price is higher than the market price, there will be a surplus in the market. If price is lower than the market price, there will be a shortage. In both instances, the market price will have to move up or down to clear the market. You should show this to the students using the graph in the Appendix. You may also want to revisit the website Economics Basics: Demand and Supply at this time.
4. Have the students visit Morrows Dump Milk To Protest Low Price to learn why farmers are deliberately dumping milk.
Discuss why farmers are doing this [There is an oversupply of milk resulting in low milk prices. The low prices mean farmers are supplying milk and losing money. If the market price is too low to cover production costs, some producers will leave the market shifting supply on the graph to the left and raising the market equilibrium price.]
Conduct the following activity to help the students understand the main concepts of the lesson.
1. Place the students in groups of four or five. Tell them they will create an ice cream stand. In their ice cream stands they will make sundaes and milkshakes. They will be judged on three points.
One point is the attractiveness of their stand. Another is the quality (or taste) of their sundaes. The final point is the quality (the taste) of their milkshakes. A group of four or five adults will independently judge the ice cream stands according to each point. The teacher will pay $15.00 to the team with the best stand, $15.00 to the team with the best sundae (plus the price of the sundae), and $15.00 to the team with the best milkshake (plus the price of the milkshake). Students must set a price for their sundaes and their milkshakesa price that will allow them to make a profit. Explain that the price of the sundae and the milkshake will be a factor in deciding which one is best. Explain that the cost of making one sundae is 25 cents, plus the cost of anyy supplies the students had to buy; the cost of a making one milkshake is 35 cents, plus costs.
2. Tell the students they will need to develop a plan for obtaining all of the necessary ingredients for making their sundae and milkshake since no group will have all of the necessary ingredients. The students will need to work well as a team, divide jobs, and formulate a plan for obtaining the ingredients they need.
3. The students will have about 30 minutes to design their stand (including menus) and make their sundae and milkshake. Please distribute the following materials to each group:
 Group 1 $15.00, milk, bowls, ice cream, chocolate syrup, straws
 Group 2 $15.00, milk, caramel, chocolate syrup, spoons, ice cream
 Group 3 $15.00, blender, cups, napkins, construction paper, markers, ice cream
 Group 4 $15.00, two scoopers, blender, markers, ice cream, milk
 Group 5 $15.00, ice cream, bowls, construction paper, blender, one scooper
 Group 6 $15.00, milk, caramel, chocolate syrup, ice cream, cups
Once the students have established their stands and produced their sundaes and milkshakes, judge each ice cream stand, taste each sundae and milkshake, and award the prize money based on the criteria established.
4. Discuss with students their thoughts and experiences as they went through the activity. Discuss whether they students used money to purchase supplies or whether they traded for the supplies. Ask how much profit they were hoping to make from each sale. Tell the students awarded the money as you did.
ASSESSMENT ACTIVITY
Ask the students to write a brief paragraph explaining how forces of supply and demand determines price. Also ask the students to write about what did or didn't make their groups successful in this activity. Finally, have the students write a paragraph explaining three or four specific ideas they learned from this lesson.
CONCLUSION
Tell the students they now have an idea of how price gets determined and how supply and demand are involved. In running a business such as an ice cream shop, business skills are essential. Developing a business plan is crucial to being successful in the real world. Understanding the forces of supply and demand as well as competition in the marketplace are essential to being successful in the real world.
EXTENSION ACTIVITY
Ask the students why the Cash for Clunkers program has been so successful. Ask them to explain how forces of supply and demand have worked in this program.
[Demand for cars was quite low. By providing additional refunds, the program made new cars more affordable. The quantity demanded for cars went up as the clunkers program is a subsidy, acting to shift the demand curve to the right..]
Ask what might happen to cars sales once the money for this program ends.
[Sales may drop, but if car dealers are creative or if car manufacturers develop popular, fuel efficient cars, sales may not drop as much.]
Ask the students if there are some items which people would buy no matter what the items cost.
[Possible examples: Water, electricity, and petroleum for our cars would be some examples. Tell students that, for these items, demand is inelastic. This means that price doesn't factor into purchasing decisions very much, since the items in question are very important us. Point out that demand may be more inelastic in the short run than in the long run. For example, in the short run, high prices may not cause people to buy less gasoline but if high prices persist for a long time people may closer to work, buy a more fuelefficient car, or use mass transit.]
EDUCATOR REVIEWS

“I like the lesson. A good idea would be to first teach the sections on supply and demand.Then, I would have students visit the Econ. Basics site.I would conclude with the ice cream simulation.”

“Where is the Appendix C? EconEdLink: For each Appendix click the "Appendix" link under resources or within the process. Thank you for your comment.”

“Thank you for this article! As a business student myself I understand how important comprehending supply and demand is.”

“I did this lesson with a group of students and they loved it. Since it was a group of students during summer camp, I modified the lesson and just focused on them doing the actual ice cream stand portion. We did touch on the vocabulary and some other aspects of the lesson beforehand. The students loved the activity and their comments afterward were insightful. I am at the camp again, the students enjoyed it so much last year that they have requested we do it again.”

Review from EconEdReviews.org
Supply and Demand for icecream!
“ I appreciate all the time it took to compile this lesson. The links for research are great and the lesson is well organized. The activity is very engaging and students will definitely get a "taste" of the realworld competition in producing a product. I do not know what the timeline for this lesson is, but I do know it would take my class several sessions to complete the research that is required to understand the concepts as they are used in the lesson. This may be a limiting factor to the lesson. I believe I would begin the lesson with the article on the farmers dumping their milk to illustrate what can happen in a market where supply does not meet demand and prices fall. I would then proceed with the flow of the lesson. I do not see any place in the lesson where the students create a business plan and research the costs and setting a price for their product. Perhaps some organizer to complete that could be helpful. I also think that a rubric to use to judge the stands could make the competition equitable. This not only would provide the judges a standard but the kids as well. I personally would do more journaling along the way of the lesson. I would connect the concepts more to their world and let them reflect on how supply and demand and prices affect them as consumers. Perhaps CD sales or concert tickets instead of looking at World Series tickets? (I realize the link was used for World Series tickets because it was well connected.) Overall I liked the lesson. I would use the lesson in parts rather than as a whole. There is so much material to cover in one shot. ”