Grade 7 Lesson plan
Brambleway Digester Biogas: A Grade 7 Proportionality Lesson
A 50-minute grade 7 math lesson where students test a fictional digester's biogas records for proportionality, find the constant, and write the equation.
Common Core Math · Grade 7
7.RP.A.2 Recognize and represent proportional relationships
Recognize and represent proportional relationships between quantities, including identifying the constant of proportionality and representing proportional relationships by equations.
Why water teaches this standard well
Students test whether the gallons collected by a rain barrel are proportional to the minutes a hose runs, identifying the constant of proportionality as the hose's flow rate and writing an equation for it. Testing for proportionality here is the same check an engineer runs before trusting a simple flow model.
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.
45 materials aligned to 7.RP.A.2
Lesson plans
Grade 7 Lesson plan
Cottersall's Aquifer and Reuse Plan: A Grade 7 Proportion Lesson
A 45-minute lesson where students find the constant linking pumping to aquifer drawdown, write its equation, and test whether a reuse plant closes the yearly deficit.
Grade 7 Lesson plan
Hartsboro Roof Rainwater: A Grade 7 Proportional Lesson
A 45-minute grade 7 lesson where students model a fictional school roof's rainwater capture as a proportional relationship and solve for the rain that fills a tank.
Grade 7 Lesson plan
Larkfen Farms Drip Irrigation: A Proportional-Reasoning Lesson
A 45-minute grade 7 lesson where students find the constant of proportionality and write an equation for water used per acre on a fictional drip-irrigated farm.
Grade 7 Lesson plan
Rivergate Utility's Retiring Operators: A Grade 7 Percent Lesson
A 50-minute grade 7 lesson using real workforce data and a fictional utility to practice percents of a workforce while surveying water-career education paths.
Grade 7 Lesson plan
Sizing the Rennick Canal: A Flow, Area, and Velocity Lesson
A 50-minute grade 7 science lesson where students use flow equals area times velocity to size a fictional canal and reason about how area and speed change flow.
Grade 7 Lesson plan
Hydration for Larkfield Middle School's Spring Sports Day
A grade 7 health lesson using a fictional track team's fluid log to build proportional reasoning about how activity time changes how much water the body needs.
Worksheets
Grade 7 Worksheet
Stonefall Dam's Powerhouse Records: A Proportionality Worksheet
A grade 7 worksheet where students test two tables from a fictional dam for proportionality, find the constant, and write an equation for the powerhouse.
Grade 7 Worksheet
Bramford Brook's Storm Hydrograph: Peak Flow and Lag Time
A grade 7 science worksheet reading an hourly storm hydrograph from a fictional brook: baseflow, peak, lag time, percent recession, flood stage, and warning time.
Grade 7 Worksheet
Quorley's Backyard Cross-Connections: Air Gaps and Hose Risks
Students apply a two-times air gap rule to three faucets, judge four household hose setups for backflow risk, and find the percent of inspected homes with a risk.
Grade 7 Worksheet
Sedge Creek Turbidity Color Card: A Ratio Worksheet
A grade 7 art-and-math worksheet where students work with a constant paint-mixing ratio for a turbidity color card at a fictional water lab.
Grade 7 Worksheet
A Farnwell Operator Trainee's Conversion Log
A grade 7 worksheet of single-step operator conversions from a fictional plant, covering gallons, pounds, flow, pressure head, acre-feet, and basin volume.
Grade 7 Worksheet
Marisbrook's Showerhead Rebate: A Conservation Career Worksheet
A grade 7 worksheet putting students in a water conservation coordinator's seat, using flow rates, percent change, and unit rates from a fictional rebate program.
Grade 7 Worksheet
Windrow Booster Pump: Pressure-Zone Design Constraints
Students size a fictional town's booster pump, turning water height into pressure and checking each neighborhood against a service pressure range.
Grade 7 Worksheet
Aldermoor Plant Turbidity: A Grade 7 Percent-Removal Worksheet
A grade 7 worksheet where students apply the removal-efficiency formula to a fictional plant's turbidity readings, then check finished water against the NTU limit.
Grade 7 Worksheet
Ashen Hollow Aquifer Recharge: A Grade 7 Proportional Worksheet
A grade 7 worksheet where students test a fictional town's recharge data for proportionality, find the constant of proportionality, and write and use an equation.
Grade 7 Worksheet
Redmoss Basin Rain and Runoff: A Proportionality Worksheet
Grade 7 students test a gauge table for proportionality, name the constant, write the runoff equation, and solve a flood-threshold inequality for a fictional basin.
Grade 7 Worksheet
Brackenfell Ridge Pressure Zones: From Elevation to psi
Students use the 0.433 psi per foot constant to turn house elevations in a fictional hill town into water pressures, then judge which homes fall outside safe limits.
Grade 7 Worksheet
Sabine Bay's Desalination Pilot: Membrane Rejection and Flow Splits
A grade 7 worksheet on a fictional town's reverse osmosis pilot, calculating percent TDS removal, the permeate-reject flow split, and a gpm-to-gallons conversion.
Grade 7 Worksheet
Cattail Marsh Pump Station: Flow Rate and Design Constraints
A grade 7 engineering worksheet where students size a fictional stormwater pump station, converting flow units and applying the continuity equation to a constraint.
Math problem sets
Grade 7 Math problem set
The Okonkwo Home Water Audit: Meter Tests, Leaks, and Wastewater
A grade 7 science problem set in which students use meter tests and a dye test to find a home leak, then trace where indoor and outdoor water goes.
Grade 7 Math problem set
Kestleby's Pressure Zones: A Distribution Operator's Math
A grade 7 problem set on tank height and water pressure in a fictional town, using the constant of proportionality and percent change the way an operator does.
Grade 7 Math problem set
Sundrell's Booster Station: An Operator Trainee's Pump Log
A grade 7 problem set built on one fictional booster station log, moving from a complex-fraction unit rate to proportional equations and license-hour percents.
Grade 7 Math problem set
Greystile's Three New Wells: A Grade 7 Drawdown Problem Set
A grade 7 problem set where students find drawdown and specific capacity for a fictional town's three wells, then size the pumping day around a demand figure.
Grade 7 Math problem set
Stannock Bend Well Field: Pump Hours Under a Drawdown Limit
A grade 7 set on a fictional well field where students find a drawdown rate as a constant of proportionality and solve an inequality for safe pump hours.
Grade 7 Math problem set
Sunhollow Farm Drip Irrigation: Proportional Water Savings
Students compare a fictional farm's sprinkler and drip systems, using proportional reasoning and percent to size the daily and seasonal water they save.
Grade 7 Math problem set
Thistledown Constructed Wetland: Nutrient Removal Design Set
Students size a fictional constructed treatment wetland, compute nutrient removal percentages, and check the design against a budget and a water-quality goal.
Grade 7 Math problem set
Ardsley Desalination Energy Use: A Grade 7 Proportional Reasoning Set
A grade 7 problem set on desalination's energy cost: students use per-1,000-gallon kWh rates to compare seawater and conventional treatment and find unit rates.
Grade 7 Math problem set
Dellmoor Booster Pumps: A Grade 7 Proportional-Rate Problem Set
A grade 7 set where students test proportionality, find a pump's flow rate as a constant of proportionality, and compute complex-fraction rates for a fictional station.
Grade 7 Math problem set
Gallowmere Dam's Summer Releases: A Grade 7 Flow-Rate Set
Students convert a dam release from cubic feet per second to gallons per day, name the conversion constant, and track signed weekly changes in reservoir level.
Grade 7 Math problem set
Halden Plant Chlorine Dosing: A Grade 7 Proportion Set
A grade 7 set where students scale a proportional chlorine feed and work with dose, demand, and residual in mg/L for a fictional drinking-water plant.
Grade 7 Math problem set
Halstead's Water Main Map: Scale Drawing Problems for Grade 7
A grade 7 math problem set using measurements from a scaled map of a neighborhood's water mains to find real lengths and areas, then convert one length to a new scale.
Grade 7 Math problem set
Marisco Canal Flow: A Grade 7 Proportional Reasoning Set
A grade 7 problem set where students use flow equals area times velocity on a fictional canal to explore proportional relationships and one flow-rate conversion.
Grade 7 Math problem set
Rookery Point Desalination: An Energy Proportionality Set
A grade 7 problem set at the fictional Rookery Point desalination pilot, where students test a table for proportionality, find the constant, and write an equation.
Grade 7 Math problem set
Harlow Heights Roof Runoff: A Rain-Capture Problem Set
A grade 7 science problem set on a fictional school's rooftop rain capture, finding runoff gallons, cistern percent captured, and how surface type changes runoff.
Grade 7 Math problem set
Wetherby Reservoir Road-Salt Chloride: A Grade 7 Proportion Set
A grade 7 problem set tracking chloride from winter road salt in a reservoir: percent increase, proportional rates, ppm equivalence, and percent error.
Grade 7 Math problem set
Nettleton Rain Barrel Array: A Proportional Relationship Set
Seven problems where students test a rain barrel array for proportionality, write its equation, and use percent to see how much of a storm it can capture.
Grade 7 Math problem set
Sable Ridge's Reverse-Osmosis Pilot: A Proportionality Problem Set
A grade 7 problem set where students test a reverse-osmosis pilot's data for proportionality, find its constant of proportionality, and write an equation.
Grade 7 Math problem set
Salt Fork Booster Station: Combining Two Pumps to Fill a Hilltop Tank
A grade 7 math set on a fictional booster station's two pumps, using proportional reasoning and percent problems to compare fill times and a fill-rate goal.
Labs & experiments
Grade 7 Lab / experiment
Settling Jars: How Particle Size Changes Water Clarity
A grade 7 science lab where students track how muddy water clears in two jars of different sediment and connect settling speed to a treatment plant's job.
Grade 7 Lab / experiment
Which Ground Soaks Up Rain? A Schoolyard Infiltration Lab
A grade 7 lab where students pour water through gravel, sand, and packed soil, time the drain, and compute infiltration rates for runoff and recharge.
Classroom activities
Grade 7 Classroom activity
Keelback Creek Culvert: A Flow-Line Drawing Studio
Grade 7 pairs test three ways to draw water speeding up in a narrow culvert (streamlines, streaks, and scaled arrows), then swap drawings for a cold-read test.
Grade 7 Classroom activity
Sizing Brackenridge Rain Gardens: A Grade 7 Station Activity
A grade 7 station-rotation activity where groups compute roof runoff and size rain gardens for a fictional campus, using proportional reasoning and a runoff rule.
Grade 7 Classroom activity
Coldbrook Operator for a Day: A Grade 7 Rate-Station Activity
A grade 7 station rotation where teams solve proportional and complex-fraction rate problems at five stops in a fictional water plant, recording answers as they go.
Projects
Grade 7 Project
A Rain Barrel Network for Hazel Court: A Grade 7 Design Project
A four-session grade 7 project where teams size a rain barrel network to capture roof runoff within a materials budget and a pad-space constraint.