Classroom activity Grade 5 Social Studies & Civics
Sharing the Reservoir: A Grade 5 Water Budget Decision Game
A grade 5 civics-and-economics game where groups represent a town's water needs and must divide a shrinking reservoir fairly, weighing scarcity and tradeoffs.
Objectives
- Students will explain that a limited water supply forces a community to make choices.
- Students will negotiate a fair way to share a reservoir and defend one tradeoff they made.
Vocabulary
- Reservoir
- A human-made lake, usually created by a dam, that stores water for later. Reservoirs supply cities and farms and help control floods.
Also: scarcity, tradeoff, negotiate, priority
Teacher overview
This is a small-group decision game for a class of about 20 to 30 students, played in five groups. Blue Rock Reservoir is a fictional lake that supplies the town of Blue Rock, and during a dry year it does not hold enough water for everyone to get all they ask for. Each group represents one town need and requests water cards, but the requests add up to more than the reservoir holds. The activity teaches scarcity directly: because the cards run out, students must trade, give up some requests, and agree on a fair split, which is exactly the kind of choice a real community faces in a drought.
Activity Directions
- Set up (5 min): Place about 20 water cards in a bowl at the front to represent the water Blue Rock Reservoir holds this dry year. Split the class into five groups and give each a role card: Homes (drinking, cooking, washing), Farms (growing food), Firefighters (a reserve for emergencies), a Business (a car wash that employs townspeople), and the Park (a splash pad and ball fields). Give each group a recording sheet.
- First requests (8 min): Each group reads its role card and decides how many water cards it wants, then writes the number and one reason on its recording sheet. Groups announce their requests. Add the requests on the board. The total will be more than 20, so the class can see the reservoir cannot fill every request.
- Negotiate (12 min): Explain that the class must agree on how to divide exactly 20 cards. Groups may argue for their need, offer to take fewer cards, or suggest which needs matter most in a drought. Guide the talk with the idea of priority: which needs are most urgent, and which could wait or use less. The class agrees on a final split and hands out the cards to match.
- Dry-month twist (8 min): Announce that the drought worsened and the reservoir now holds only 15 cards. Collect 5 cards back. Groups must decide together which needs give up cards, and record what changed and why.
- Debrief (7 min): Gather the class and discuss the two debrief questions below. Ask each group to name one tradeoff it accepted and how the class decided what was fair. End by connecting the game to real towns that must share limited water in a drought.
Student Handout
Group recording sheet. Fill in each line as you play.
- Our town need is:
- Water cards we requested at first, and our reason:
- Water cards we received after negotiating:
- Water cards we received after the dry-month twist:
- One tradeoff our group accepted:
- One thing that made the final split fair or unfair, in our opinion:
From Water for Schools (waterforschools.org). This material is in the public domain (CC0) and may be copied, edited, and shared freely.
Answer Key
Debrief question 1: "Why could the reservoir not fill every group's request?" Because the water supply was limited to 20 cards, while the groups together asked for more than 20. When a supply is smaller than what everyone wants, that is scarcity, and it forces the community to make choices.
Debrief question 2: "How did the class decide what was fair when water got even shorter?" Answers will vary. Look for reasoning about priority, such as protecting drinking water and a firefighting reserve first, asking the car wash or splash pad to use less, and having each group give up something so no single need lost everything. Strong answers name a specific tradeoff, for example, "The park took fewer cards so homes could keep enough to drink."
Differentiation
Support
Give these groups a role card with a suggested request already written and one sentence explaining their need, so they can focus on the negotiation rather than the setup. Pair a strong speaker with a quieter partner to present the group's request together.
Extension
Ask a group to act as a "water council" that proposes a written rule for how Blue Rock should share its reservoir in any future drought, listing which needs get priority and why, then present it to the class for a vote.
ELL supports
Add a small icon to each role card (a house, a tractor, a fire truck, a car, a slide) so roles are clear without heavy reading. Provide sentence frames for the negotiation: "Our group needs water because ___," and "We can give up ___ cards so that ___."
Extensions
Connect the game to a real place by finding a nearby reservoir or lake that supplies your area. Many water agencies post their current reservoir levels online, and comparing a real reservoir's ups and downs with the Blue Rock game helps students see that sharing limited water is an ongoing decision for real communities.