Grade 12 Lesson plan
Hessemere's Desalination Contract: Who Carries the Risk
A 90-minute grade 12 lesson comparing a fictional city's thirty-year desalinated water purchase agreement with building its own plant, across wet, normal, and dry years.
C3 Framework · Grades 9–12
D2.Eco.2.9-12 Marginal benefits and costs in economic arguments
Use marginal benefits and marginal costs to construct an argument for or against an approach or solution to an economic issue.
Why water teaches this standard well
Water supply planning is genuinely marginal thinking, because each additional source, from conservation to reuse to desalination, tends to cost more than the last. Students can use marginal cost and benefit reasoning to argue where a growing city should find its next acre-foot of supply.
Materials tagged with this code are written to the full standard , and each carries a written note explaining the alignment. See how we review materials.
50 materials aligned to D2.Eco.2.9-12
Lesson plans
Grade 10 Lesson plan
Culverdon's Biosolids Decision: Landfill, Fields, or Digester
A grade 10 lesson in which students cost three disposal options for a fictional plant's biosolids, then argue the choice at a simulated district board hearing.
Grade 12 Lesson plan
Buying Phosphorus Credits on the Ainsdale River
A grade 12 lesson where students compute a fictional plant's phosphorus load and price a treatment upgrade against farm credits at a 2-to-1 trading ratio.
Grade 11 Lesson plan
Two Water Career Paths in Marn Hollow: A Cost-Benefit Lesson
A 50-minute grade 11 lesson where students calculate the multi-year earnings of two water-career paths, then argue with marginal cost and benefit reasoning.
Grade 9 Lesson plan
Should the Sattlers Buy a Reverse-Osmosis System? A Cost Lesson
Grade 9 consumer-science lesson comparing the per-gallon cost of a pitcher filter, an under-sink reverse-osmosis system, and bottled water for a family.
Grade 9 Lesson plan
Who Will Run the Plant? A Grade 9 Water Workforce Lesson
A 50-minute grade 9 careers lesson where students model the sector's retirement wave and build a cost-benefit argument for how a utility should fill operator openings.
Grade 10 Lesson plan
Flat, Tiered, or Budget-Based? Comparing Water Rate Structures
A grade 10 lesson where students compute a household bill under three rate designs for the fictional town of Verde Junction and judge which best rewards conservation.
Grade 12 Lesson plan
Designing Calderwood's Water Rates: A Cost-of-Service Workshop
A capstone grade 12 economics workshop in which students design a water rate structure for a fictional city and analyze how each option shifts costs among households.
Worksheets
Grade 11 Worksheet
Ravenshoe's Sewer Consent Decree: A Grade 11 Schedule Worksheet
Students compare two court-ordered sewer schedules for a fictional city, test each against a widely used affordability benchmark, and weigh marginal control costs.
Grade 12 Worksheet
Ashgate Springs Rebate Program: Conservation Specialist Math
Grade 12 worksheet comparing three water conservation rebates by cost per thousand gallons saved, then arguing which ones cost less than buying more water.
Grade 11 Worksheet
The Trenholm Bottoms Levee: A Grade 11 Benefit-Cost Worksheet
Students apply the benefit-cost test federal flood control has used since 1936 to two options for a fictional river district, a levee or an upstream detention basin.
Grade 9 Worksheet
Ospley Water District's PFAS Treatment Costs: A Cost-Benefit Worksheet
A grade 9 economics worksheet where students find the per-household cost of PFAS treatment for a fictional water district and weigh two compliance options.
Grade 10 Worksheet
Where the Rate Dollar Goes: A Weller Falls Water Budget Worksheet
A grade 10 worksheet where students read a fictional city water budget, compute each category's dollars, and judge a proposed shift toward pipe repair.
Grade 11 Worksheet
Hoover Dam and the Colorado River: A Grade 11 Civics Worksheet
A grade 11 worksheet pairing the history of federal dam building with allocation and hydropower math for a fictional Colorado River water district.
Math problem sets
Grade 12 Math problem set
Skelwick Valley Reuse Program: Acre-Foot Cost Math
Grade 12 problem set on recycled water economics: annual production in acre-feet, revenue, avoided cost, payback, energy use, and a marginal-cost supply argument.
Classroom activities
Grade 9 Classroom activity
Rennick's Next Acre-Foot: A Water-Supply Cost Ranking Activity
A grade 9 simulation where teams act as a fictional city's water board, ranking supply options by marginal cost to fill a demand gap at the lowest total cost.
Grade 11 Classroom activity
Vireo's Next Acre-Foot: A Grade 11 Water Supply Planning Activity
A grade 11 simulation where teams plan a fictional city's new water supply by marginal cost, choosing among conservation, reuse, and desalination options.
Grade 12 Classroom activity
Ambleford's Water Capital Budget Challenge: A Grade 12 Activity
A grade 12 economics activity where student teams choose a fictional city's water projects under a fixed capital budget, then adjust when federal mandates take priority.
Reading passages
Grade 9 Reading passage
Why Water Bills Keep Rising: Aging Pipes and a Family Budget
A grade 9 consumer-science reading passage on how aging water pipes, main breaks, and deferred repairs push household water bills up faster than inflation.
Writing prompts
Grade 10 Writing prompt
Halverton County's Next CTE Pathway: A Funding Argument
A grade 10 careers argument prompt in which students advise a fictional school board on funding a water technology pathway or expanding health sciences.
Grade 9 Writing prompt
Teasdale Irrigation: Retrain the Crew or Hire New Technicians?
A grade 9 careers argument prompt: students advise a fictional irrigation district's board on retraining its ditch riders or hiring certified irrigation technicians.
Grade 10 Writing prompt
Ashenmoor's Workforce Budget: Apprentices or Signing Bonuses
A grade 10 careers argument prompt asking students to recommend how a water utility should spend its workforce budget, with a planning organizer, exemplar, and rubric.
Grade 9 Writing prompt
How Should Silverbeck Spend Its Training Budget?
A grade 9 argument prompt asking students to recommend how a fictional water authority spends one training budget: a degree for one employee or six license upgrades.
Debate kits
Grade 11 Debate kit
Vantrell's Meter Readers and the Move to Advanced Metering
A grade 11 careers debate kit on whether a utility should convert to advanced metering when the change ends four meter reading jobs, with two-sided evidence.
Grade 12 Debate kit
Pellinore Flats: In-House Pipe Crew or Contracted Replacement?
A grade 12 careers debate kit on whether a fictional water district should staff its own main replacement crew, with a cost table, two-sided evidence, and a rubric.
Grade 11 Debate kit
Relicense or Remove the Kilnwood Dam: A Grade 11 Debate Kit
A grade 11 debate on whether a fictional river commission should support a new license for an aging hydropower dam or fund its removal, with two-sided evidence.
Grade 9 Debate kit
Should Ryehill Sell Treated Water to Neighboring Pentrewick?
A grade 9 debate kit on a fictional twenty-year wholesale water contract, weighing revenue and spare plant capacity against a town's own future supply.
Grade 10 Debate kit
Kirtlebrook Water District: A Contract Operations Debate Kit
A grade 10 careers debate kit on whether a small water district should hire a contract operations firm or keep in-house staff, with two-sided evidence and a rubric.
Grade 9 Debate kit
Should Marnley Contract Out the Operation of Its Water Plant?
A grade 9 debate kit on whether a fictional town should hire a contract firm to run its water plant instead of employing its own licensed operators.
Grade 12 Debate kit
Should Thurlow County Approve the Draycott Data Center?
A grade 12 debate kit on a fictional county's 20-year water service agreement with a data center, with two-sided evidence on jobs, aquifer decline, and rates.
Grade 9 Debate kit
Should Graymont Recycle Wastewater into Drinking Water? A Debate Kit
A grade 9 debate kit on whether a fictional city should recycle its wastewater into drinking water, with two-sided evidence on cost, safety, and drought.
Projects
Grade 10 Project
Draythorne's Pump Overhaul Plan: A Maintenance Planner Project
A grade 10 careers project where teams act as maintenance planners, ranking seven pumps by cost per added service year and scheduling a year of overhauls.
Grade 12 Project
Standen Ford Water Reclamation: Build the Shift Staffing Plan
A four-session grade 12 careers project scheduling round-the-clock licensed coverage for a fictional reclamation plant within staffing and labor cost limits.
Grade 9 Project
Haldreth's PFAS Treatment Upgrade: A Utility Staffing Plan
A five-session grade 9 careers project in which teams staff a fictional district's new PFAS treatment building against licensing rules and a fixed payroll budget.
Grade 10 Project
Water Service for Tessary Hollow: A County Board Proposal
A five-session grade 10 project in which students map a fictional community on failing wells, cost three service options, and argue one to a county board.
Grade 11 Project
The Water Element of the Fallowdale County Plan: A Grade 11 Project
Across five sessions students write the water chapter of a fictional county's 20-year comprehensive plan, map its supply, and defend three ranked options at a hearing.
Grade 9 Project
Coppleston County's Small Water Systems: A Consolidation Study
A five-session grade 9 project in which teams map six fictional county water systems, compare bill burdens, and recommend whether to form a regional authority.
Quizzes & test questions
Grade 9 Quiz & test questions
Water-Sector Careers Unit Test: Roles, Pathways, and Math
A grade 9 careers unit test mixing multiple-choice, short-answer, and computation items on water-sector roles, education pathways, workforce data, and operator math.
Grade 12 Quiz & test questions
Financing the Pipe Gap in Harmon City: A Grade 12 Finance Assessment
A grade 12 utility-finance assessment applying real infrastructure and affordability data to a fictional city's rate decision, mixing computation and policy analysis.
Graphic organizers
Grade 12 Graphic organizer
Yarrowfield Well Field: From Nitrate Trend to a New Job Description
A grade 12 careers cause-and-effect chain organizer tracing how a rising nitrate trend at a fictional well field turns into new tasks, roles, credentials, and costs.
Grade 9 Graphic organizer
Four Alderbeck Job Postings: A Grade 9 Pathway Matrix
A grade 9 organizer mapping four openings at a fictional water utility to the education path, the license or exam involved, and the next step each job leads toward.
Grade 9 Graphic organizer
Handling a PFAS Advisory at Home: A Grade 9 Options Organizer
A grade 9 compare-and-contrast organizer weighing a certified filter, bottled water, and reverse osmosis as responses to a fictional town's PFAS advisory.
Career spotlights
Grade 10 Career spotlight
Elmhaven Wastewater Operator: Nutrient Removal on the Night Shift
A grade 10 career spotlight on a wastewater operator who removes nitrogen and phosphorus, with real pay and licensing figures and keyed discussion questions.
Grade 11 Career spotlight
Corveil Desalination: A Membrane Process Engineer Career Profile
A grade 11 career spotlight on a membrane process engineer at a seawater desalination plant, covering daily work, the engineering degree path, and honest pay data limits.
Grade 11 Career spotlight
Nutrient Removal at Kettleford: A Wastewater Operator Career Profile
A grade 11 career spotlight on a wastewater operator who runs the nutrient-removal process at a water resource recovery facility, with real pay and job-outlook data.
Grade 12 Career spotlight
Recovering Nutrients: A Resource Recovery Plant Operator
A grade 12 career spotlight on a water resource recovery operator who both removes and captures nutrients, with the licensing path and operator pay data.
Grade 12 Career spotlight
Running the Membranes: A Reverse Osmosis Plant Operator
A grade 12 career spotlight that follows a reverse osmosis plant operator through one shift, covering the licensing path, operator pay data, and job outlook.
Grade 9 Career spotlight
Harmon Valley's Shift Lead: A Water Treatment Operator Profile
A grade 9 career spotlight following a treatment plant operator's shift, covering the state license classes, real pay and openings data, and the on-the-job training path.
Grade 12 Career spotlight
Civil Engineer in Water Infrastructure: A Grade 12 Career Profile
A grade 12 career spotlight on civil engineers who design water infrastructure, covering the degree-to-license path, daily tasks, and sector-wide workforce demand.
Grade 9 Career spotlight
Distribution System Operator: A Grade 9 Career Profile
A grade 9 career spotlight on the operator who keeps treated water moving through the pipe network, covering licensing, real pay figures, and job openings.