Grade 10 Lesson plan
Pentyre Gorge Hydro Plant: Energy Density of Stored Water
A 50-minute grade 10 lesson where students compute energy per acre-foot and per surface acre for two fictional basins, then pick the quantity that fits.
Common Core Math · High School
HSN-Q.A.2 Define appropriate quantities for modeling
Define appropriate quantities for the purpose of descriptive modeling.
Why water teaches this standard well
Students decide whether to model a city's water demand using total gallons, gallons per capita per day, or gallons per household, choosing whichever quantity best answers the planning question at hand. Selecting the right quantity to model is a decision real water-resource planners make before a single calculation begins.
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.
58 materials aligned to HSN-Q.A.2
Lesson plans
Grade 11 Lesson plan
Stonecross Rainfall Bands: A Woven Data Lesson
Grade 11 students encode a year of fictional rainfall as stripe widths on a woven band, choosing a scale that fits a fixed warp length.
Grade 12 Lesson plan
Umberfield Sewer Inflow and Infiltration: A Wet-Weather Lesson
A grade 12 lesson where students compare dry- and wet-weather flows at a fictional wastewater plant, quantify inflow and infiltration, and price the extra treatment.
Grade 11 Lesson plan
Sundale Reservoir PFAS: Making Sense of Parts Per Trillion
A 45-minute grade 11 math lesson using scientific notation to convert PFAS units, find the mass in a fictional reservoir, and compare readings to the federal limit.
Grade 12 Lesson plan
Haleboro's Aging Mains: Replacement Rate and Backlog
A grade 12 lesson where students compute a water system pipe replacement rate, cycle, funding gap, and backlog, then link the results to an infrastructure grade.
Grade 11 Lesson plan
Prioritizing Water-Main Replacement: A Dunmore Decision-Matrix Lesson
A grade 11 engineering lesson where students use a weighted decision matrix to rank which aging water mains the fictional city of Dunmore should replace first.
Grade 9 Lesson plan
Ashcombe's Growing Water Demand: Choosing the Right Quantity to Model
A grade 9 lesson where students build a linear function from two years of population and water-demand data and decide which quantity best models growth.
Worksheets
Grade 10 Worksheet
Cedar Hollow's Water Report: Calculating the Summary Numbers
A grade 10 worksheet in which students rebuild a fictional town's water report from raw lead, chlorine and turbidity data, then judge each result by its rule.
Grade 9 Worksheet
Stoneharrow Resource Recovery: A Biosolids Technician's Log
A grade 9 careers worksheet where students complete a fictional facility's biosolids log: dry tons, hauling, nitrogen application acres, and permit recordkeeping.
Grade 11 Worksheet
Lammermoor Brook Bacteria Counts: The Geometric Mean on a Log Scale
A grade 11 worksheet comparing the arithmetic and geometric means of five skewed bacteria counts, using base-ten logarithms and one added low sample.
Grade 9 Worksheet
Dividing the Ferncliffe Coatings PFAS Settlement Fund
A grade 9 worksheet in which students test three ways of splitting a fictional PFAS settlement among three water systems and decide who pays the remainder.
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 12 Worksheet
Redlaw Flats Irrigation District: A Ditch Rider's Delivery Math
Grade 12 worksheet converting canal flow among cfs, gpm, MGD, and acre-feet per day, then sizing farm water orders and delivery times for a fictional district.
Grade 9 Worksheet
Kilnworth Operator Licensing: A Grade 9 Careers Worksheet
A grade 9 careers worksheet where students apply a state board's operator licensing rules: plant class, creditable experience, contact hours, and the exam deadline.
Grade 10 Worksheet
Pennyford Sanitary Sewer: Inflow and Infiltration Math
A grade 10 worksheet measuring storm water leaking into a fictional town's sanitary sewer, then pricing the extra treatment and testing what a lining project would fix.
Grade 9 Worksheet
Scaling a Norwick Water Tower Mural: A Grade 9 Geometry Worksheet
Grade 9 art and geometry worksheet where students model a water tower tank as a cylinder and scale a mural design using linear and area scale factors.
Grade 12 Worksheet
Sitwell Basin Aquifer Storage and Recovery Worksheet
A grade 12 worksheet on a fictional aquifer storage and recovery project: porosity from core samples, recoverable storage in acre-feet and gallons, and injection math.
Grade 10 Worksheet
How Much Does Bottled Water Really Cost the Ramos Family?
A grade 10 consumer worksheet comparing the per-gallon and yearly cost of bottled versus tap water for a fictional family, with two conservation calculations.
Grade 10 Worksheet
Copperline Water Authority Flow Conversion Worksheet
A grade 10 worksheet chaining unit conversions for a fictional river withdrawal: MGD to gpm to cfs, gallons to acre-feet, and pipe area from the continuity equation.
Grade 10 Worksheet
Ochreford Utility Staffing: Operator Shifts, Licenses, and Pay
A grade 10 worksheet where students staff a fictional water plant around the clock, then compare paying overtime with hiring using national operator wage data.
Grade 10 Worksheet
Verdant Hollow Recovery Facility: Nutrient Load and Removal
A grade 10 worksheet using the pounds formula to find nitrogen and phosphorus loads, removal efficiency, and permit compliance at a fictional treatment plant.
Grade 11 Worksheet
Thackery Mills Reclamation Plant: Loading and Removal Efficiency
A grade 11 worksheet applying the pounds formula and removal-efficiency percentages to a fictional water reclamation facility's BOD and TSS data.
Grade 12 Worksheet
Deblin Creek Reclamation: F/M Ratio, Sludge Age, and Loading
A grade 12 wastewater worksheet on activated sludge process control: solids inventory, BOD loading, the F/M ratio, sludge age, and removal efficiency.
Grade 12 Worksheet
Talbrook Water Authority Staffing: Operator Hours and Payroll
A grade 12 worksheet on staffing a fictional plant around the clock: coverage hours, full-time equivalents, overtime versus a new hire, and cost per connection.
Grade 12 Worksheet
Nitrification Stoichiometry and Alkalinity at Cawdry
A grade 12 science worksheet deriving oxygen demand and alkalinity destruction per gram of nitrogen from a balanced equation, then applying both to a plant's daily load.
Grade 12 Worksheet
Ravenglass Dam Hydropower: Head, Flow, and Energy
A grade 12 physics worksheet using the hydropower equation to find power, daily energy, and capacity factor for a fictional dam, with a drought sensitivity case.
Grade 12 Worksheet
Disinfection CT and Baffling at the Whitcombe Clearwell
A grade 12 science worksheet on chlorine CT: students find contact time from clearwell volume and flow, apply a baffling factor, and check CT against a target.
Grade 9 Worksheet
From Job Posting to Paycheck: Water-Sector Wage Math
A grade 9 careers worksheet where students convert hourly wages to annual pay, compare operator pay percentiles, and choose the right quantity for each comparison.
Grade 12 Worksheet
Alder Flats Well Field: Drawdown and Specific-Capacity Worksheet
A grade 12 engineering worksheet where students compute well drawdown, specific capacity, and daily yield for two wells in a fictional well field, then compare them.
Grade 12 Worksheet
Flow and Pipe Velocity at the Cormorant Bay Pump Station
A grade 12 worksheet where students convert a booster pump station's flow among MGD, gpm, and cfs, then use the continuity equation to find pipe velocity.
Grade 12 Worksheet
Hollow Creek Desalination Facility: RO Recovery and Rejection Rates
A grade 12 worksheet using a fictional reverse osmosis plant to calculate percent recovery, salt rejection, and concentrate flow from feed and permeate data.
Grade 9 Worksheet
Spruce County Turbidity: A Water-Quality Compliance Worksheet
Grade 9 worksheet where students calculate a fictional rural water system's monthly turbidity compliance percentage against the real federal 95 percent standard.
Grade 10 Worksheet
Brookhaven's Water Quality Report: A Consumer Science Worksheet
A grade 10 health and consumer science worksheet where students interpret a fictional town's annual water quality report against real EPA regulatory limits.
Math problem sets
Grade 11 Math problem set
Ferrisholt Stormwater Fees: An ERU and Runoff Problem Set
A grade 11 careers problem set in which students work as a stormwater program specialist, billing a shopping center by impervious area and checking its peak runoff.
Grade 12 Math problem set
Brayfield Ridge UV Disinfection: An Operator's Dose Math
Grade 12 problem set on ultraviolet disinfection operations: reactor loading, exposure time, derated delivered dose, and putting a standby reactor in service.
Grade 12 Math problem set
Verlow Reservoir Drought Supply: Acre-Foot and Demand Problems
A grade 12 problem set where students convert a fictional reservoir's acre-foot storage to gallons, subtract the dead pool, and project days of supply in a drought.
Grade 10 Math problem set
Ravenglass Dam Hydropower: Capacity Factor and Energy
A grade 10 problem set separating power from energy: students find capacity factor, convert MWh to kWh, and count homes powered at a fictional hydroelectric dam.
Grade 12 Math problem set
Coyle Valley Irrigation District: Acre-Feet and Conveyance
A grade 12 problem set on a fictional irrigation district, chaining acre-feet, gallons, MGD, and cfs while accounting for canal conveyance losses and crop water.
Grade 12 Math problem set
Craymoor Pump Station: Horsepower, Efficiency, and Energy Cost
A grade 12 problem set on pump math: total dynamic head, water and brake horsepower, wire-to-water efficiency, energy cost in kWh, and the pump affinity laws.
Grade 12 Math problem set
Ostwick Recovery Facility: Nutrient Loading and Phosphorus Recovery
A grade 12 problem set on nutrient loads at a recovery facility: nitrogen and phosphorus loading, removal efficiency, and phosphorus recovered as fertilizer.
Grade 9 Math problem set
Nethersby Water District: Operator Staffing and Wage Math
A grade 9 problem set on staffing a fictional utility's round-the-clock shifts, then comparing its starting wage with national operator pay and openings data.
Grade 9 Math problem set
Perrin Bay Desalination: RO Recovery Rate and Energy Set
A grade 9 problem set on Perrin Bay's seawater reverse osmosis plant: recovery rate, concentrate flow, and the energy each thousand gallons of drinking water costs.
Grade 12 Math problem set
Dellacre Farm Irrigation Demand: Net, Gross, and Efficiency
A grade 12 problem set on irrigation water math: students convert crop needs to acre-feet, apply system efficiency to find gross demand, and size the delivery flow.
Grade 12 Math problem set
Kingsley Cove Brackish RO: Recovery and Mass Balance
A grade 12 problem set on a fictional reverse-osmosis plant, finding recovery, salt rejection, a brine mass balance, concentration factor, and daily treatment energy.
Grade 12 Math problem set
Pinehaven Watershed Water Budget: Precipitation to Supply
A grade 12 problem set turning a fictional watershed's rainfall into acre-feet and gallons, then splitting it into evapotranspiration, runoff, and recharge.
Classroom activities
Grade 10 Classroom activity
Fettercairn's Hiring Panel: An Operator in Training Offer
A grade 10 careers role-play where panels weight a job posting into a scoring sheet, rank three candidates, and choose one hiring incentive within a budget.
Grade 12 Classroom activity
Glenrowe Water Age Relay: Tracing Travel Time Through Mains
A 50-minute grade 12 team relay in which students convert flows to velocities, compute pipe travel times, and find which node holds the oldest water.
Grade 12 Classroom activity
Verrindale Leak Survey Round: Ranking Segments by Expected Value
A 45-minute grade 12 team round where students compute expected water-loss recovery per survey dollar and choose a leak survey plan under a fixed budget.
Grade 9 Classroom activity
Sallowford Pretreatment Inspectors: A Discharge Permit Role-Play
A grade 9 careers role-play where three-person teams inspect three fictional industries, compute each discharge load in pounds per day, and decide the permit action.
Grade 9 Classroom activity
Westerholt Digester Night Shift: An Operator Log Relay
A grade 9 careers relay where crews work a fictional digester's night log, computing solids reduction, gas yield, and engine output before each call-out decision.
Grade 11 Classroom activity
Tideport Beach Advisory Icons: A Blind Test Activity
Grade 11 students draw candidate advisory icons for a fictional coastal town, then run a randomized blind comprehension test on classmates and revise from the tallies.
Grade 10 Classroom activity
Torres Household Water-Use Audit: A Fixture Station Rotation
A grade 10 station activity where students audit a fictional household's daily water use fixture by fixture, then compute simple conservation savings.
Grade 10 Classroom activity
Water Workforce Career Fair: A Station-Rotation Pathways Activity
A grade 10 station-rotation activity comparing five water-sector career paths, from direct-entry licensure through graduate study, and the education route behind each.
Projects
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
Kelmarsh Valley Irrigation District: Allocating a Short Supply
A five-session grade 10 project in which teams display thirty fictional parcel requests, model district constraints, and propose a seasonal allocation rule.
Grade 11 Project
Ashgrove Water Museum: A Three-Panel Exhibit Design
Over four sessions, grade 11 teams design three exhibit panels for a fictional town water museum, working to fixed panel sizes, type minimums, and a print allowance.
Grade 12 Project
Fenwick County Water Utility: A Capital Plan and Rate Proposal Project
A grade 12 multi-session project where student teams build a capital improvement and rate plan for a fictional utility, constrained by an affordability limit.
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.