Grade 7 Lesson plan
Chancery Flats Detention Basin: A Grade 7 Inequality Lesson
A 50-minute grade 7 math lesson where students write and solve inequalities for how long a fictional town's stormwater basin can fill before it overflows.
Common Core Math · Grade 7
7.EE.B.3 Solve multistep problems with rational numbers
Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically, and assess the reasonableness of answers using mental computation and estimation strategies.
Why water teaches this standard well
Students combine a decimal per-gallon water rate, a fractional discount for low-income households, and a flat sewer fee into one multistep calculation of a family's total monthly bill. Mixing decimals, fractions, and whole numbers in a single water bill is exactly the real-world messiness this standard asks students to manage.
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.
39 materials aligned to 7.EE.B.3
Lesson plans
Grade 7 Lesson plan
Drumlin Fields Farm's Soil Moisture Ledger: A Grade 7 Lesson
A 50-minute grade 7 math lesson where students add and subtract signed decimals to track a fictional farm's stored soil water through a dry irrigation week.
Grade 7 Lesson plan
Quarrymere's Treatment Wetland Plan: A Grade 7 Scale Lesson
A 55-minute grade 7 math lesson where students read actual lengths and areas from a fictional village's wetland site plan, then redraw one cell at a new scale.
Grade 7 Lesson plan
Kirkwell River Spill: Hours Until It Reaches Standale's Intake
A 50-minute grade 7 science lesson where students convert a river's current to miles per hour, find a spill's travel time, and plan sampling before the intake closes.
Grade 7 Lesson plan
Sable Bend's Drought Ration: Ranking Household Water Uses
Students work out a fictional family's daily gallons under a drought limit, find the percent cut required, and decide which uses protect health and get cut last.
Grade 7 Lesson plan
Hollenbeck Brook's Stream Gauge: A Grade 7 Conversion Lesson
A 50-minute grade 7 math lesson where students convert a fictional brook's gauge readings between cubic feet per second, gallons per minute, and MGD.
Grade 7 Lesson plan
Ketterwick's Standpipe Loan: A Grade 7 Simple Interest Lesson
A 50-minute grade 7 math lesson where students compute simple interest on a fictional town's loan for a new standpipe and share the cost per household.
Grade 7 Lesson plan
Brill Hollow's Tiered Water Bill: Computing Charges and Percents
A 50-minute grade 7 lesson where students compute tiered water bills for a town and explain why higher tiers charge more per gallon to encourage conservation.
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
Glasswing Utility Water-Loss Audit: A Grade 7 Percent Lesson
A 45-minute grade 7 lesson where students find the percent of water a fictional utility loses to leaks, then calculate a percent decrease after repairs.
Grade 7 Lesson plan
Reading the Okafor Family's Dunmore Water Bill After a Rate Increase
A grade 7 consumer-math lesson where students read a fictional household water bill, compute a two-step percent rate increase, and judge whether it is affordable.
Grade 7 Lesson plan
Corvid Hollow Rain Garden: Defining Design Criteria and Constraints
A 50-minute grade 7 lesson where students separate design criteria from constraints for a school rain garden and calculate the runoff volume it must capture.
Grade 7 Lesson plan
Halloway Creek Filter Trials: Evaluating Three Prototype Water Filters
A 50-minute grade 7 lesson where student teams score three prototype filter designs on a weighted rubric and use the totals to choose the strongest design.
Worksheets
Grade 7 Worksheet
Pethwick's Corrosion Control Results: A Grade 7 Percent Worksheet
A grade 7 worksheet where students compute percent decrease, percent of a budget, and a cost per account from a fictional water district's lead tap results.
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
Windleford Junction Fire Flow: Sizing a Storage Tank Reserve
A grade 7 worksheet where students stack a fire reserve, a day of demand, and an operating reserve, then test a fictional village's proposed tank against the total.
Grade 7 Worksheet
Cobalt Springs Dam Reservoir: A Grade 7 Percent-Change Worksheet
A grade 7 worksheet using a fictional dam's reservoir storage to practice percent of capacity, percent increase, and percent decrease across a season.
Grade 7 Worksheet
Ironvale's Sludge Thickener: A Grade 7 Percent-Solids Worksheet
Students work through percent solids, percent decrease, and percent increase using daily sludge and digester gas records from a fictional recovery facility.
Grade 7 Worksheet
Cinderwood's Well 3: Reading Drawdown in a Pumping Test
A grade 7 groundwater worksheet using a fictional town's well-pumping data to calculate drawdown, compare two wells, and reason about the cone of depression.
Grade 7 Worksheet
Blue Harbor Water Bill: A Multistep Percent Increase Worksheet
A grade 7 math worksheet where students compute two households' water bills before and after a rate increase, applying multistep percent reasoning to a fictional utility.
Math problem sets
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
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
Caldervale's Hydrant Flow Test: A Grade 7 Rate Set
A grade 7 problem set where students find flow rates from fractional fill times during a fictional town's hydrant test and compare them with a target.
Grade 7 Math problem set
Delvin's Leak Survey: Water-Loss Math for a Detection Crew
A grade 7 problem set following a leak detection crew through one fictional town's water audit, using percent of pumped water, unit rates, and percent change.
Grade 7 Math problem set
Copperline Lead Service Line Replacement: A Percent and Budget Set
Students plan a fictional town's lead service line replacement, finding yearly pace, program cost, grant share, and how a test result compares to the action level.
Grade 7 Math problem set
Ironmoss Creek Digester: Biogas Sizing and Solids Reduction
A grade 7 problem set on a fictional sludge digester where students work percent reduction, biogas volume, and the share of a plant's daily electricity it covers.
Grade 7 Math problem set
Blending Peckhaven's Two Wells: A Grade 7 PFAS Mixing Set
Students weight each well's PFOA level by its share of the blended flow, compare that result to a plain average, and find the percent drop needed to meet the limit.
Grade 7 Math problem set
Hartsel's Water Rate Increase: A Percent-Change Problem Set
A grade 7 problem set: students compute a town's water bills before and after a rate hike, find percent increases, and check them against affordability guidance.
Grade 7 Math problem set
Longmarsh Plant Operator Rounds: A Grade 7 Unit-Rate Set
Students find rounds-per-hour rates from fractional shift times, then compute regular pay, overtime, and the class sessions needed to finish a renewal requirement.
Grade 7 Math problem set
Pelham Reach Farm Nitrogen: A Grade 7 Percent Problem Set
A grade 7 problem set tracking nitrogen on a fictional farm as both a crop resource and a runoff pollutant, using multistep percent of a changing base.
Grade 7 Math problem set
Saltcedar Reverse Osmosis: A Grade 7 Recovery-Percent Set
A grade 7 set where students find recovery and salt-removal percents, percent increase, and energy cost for a fictional reverse-osmosis plant using decimal chains.
Grade 7 Math problem set
Corbray Reservoir in a Dry Year: Acre-Feet and Days of Supply
Ten problems in which students convert acre-feet to gallons, compute days of supply for a fictional town, and test how growth and evaporation shorten it.
Grade 7 Math problem set
Marchford's Water Loss Audit: Percent Lost Between Plant and Tap
Ten problems comparing what a fictional city's plant produces with what its meters record, finding the percent lost to leaks and what a repair program recovers.
Grade 7 Math problem set
Stonecrop Ridge Cistern: Scale Drawing and Tank Volume Set
Eight problems where students convert a rainwater cistern blueprint's scale measurements to actual feet, find its volume in gallons, and redraw it at a new scale.
Grade 7 Math problem set
Brackenmoor Retention Basin: A Budget and Percent Problem Set
Eight problems where students apply a bulk discount, sales tax, and an installation fee to a stormwater basin materials budget and check it against a total.
Grade 7 Math problem set
Marrow Creek Filter Plant's Backwash Costs: A Problem Set
A grade 7 problem set where students calculate a filter plant's backwash water use and cost, mixing decimals and fractions in every step.
Projects
Grade 7 Project
Cutting Nitrogen at Crannock Farm: A Grade 7 Watershed Project
A five-session grade 7 math project where teams price farm practices, compute percent reductions, and pitch a nitrogen plan to a fictional watershed board.
Grade 7 Project
Brackenwood Hollow Well Owners: A Family Water Health Plan
Teams build a four-page booklet, a testing calendar, and a cost table for a fictional private-well household that stay inside a fixed yearly testing budget.
Grade 7 Project
Kessel Ridge Fountains After Summer: A Flush and Test Plan
Teams schedule a fictional school's fountain flushing for the day before classes start, choose which fixtures to sample for lead on a fixed budget, and notify families.