Two Places, Two Results
At Juniper Hill School, a student team in the makerspace builds wooden book stands. A book stand holds a book open on a desk. The team buys wood, plans the designs and works together to make the stands. The number of stands ready to sell is the supply. The number of stands shoppers want at a stated price is the demand.
The team first set up near the library entrance during Family Reading Night. They brought 12 stands and priced each one at $10. Twenty-one shoppers wanted to buy a stand at that price. The team sold all 12, but some shoppers arrived after the stands were gone. The team wrote down the numbers before planning its next sale.
The next sale was in the gym lobby during Student Showcase Night. This time, the team brought 24 stands and again started at $10 each. Fifteen shoppers wanted a stand at that price, so nine stands remained. Near the end of the evening, the team marked the remaining stands down to $8. Four more shoppers bought stands at the lower price.
Before the next event, the team made a planning graph. It showed how many book stands shoppers requested at four possible prices. The team wanted to compare the choices before deciding how many stands to make and what price to post.