Grade 9 Math problem set
Rennick Valley Center Pivots: Run Times and Canal Capacity
A grade 9 problem set on scheduling six center pivots under a canal limit using acre-inches, run times, inequalities, and wheat water use per pound.
Water Math · Grade 9
Students practice grade-level mathematics on real utility quantities such as flow rates, tank volumes, and water bills, using the same formulas that appear on operator licensing exams.
64 materials written for this grade · refine by type, topic, or standard in the catalog
Grade 9 Project
Thurlby's Stormwater Fee: Setting a Rate and a Credit Schedule
A five-session grade 9 project where teams measure hard surfaces, build a revenue equation for a town stormwater fee, and defend a credit schedule to a council panel.
Grade 9 Project
Whitmoor Creek Dam: A Repair, Retrofit, or Removal Study
A grade 9 project where teams model twenty-year costs for three options at a fictional mill dam and recommend one to a river district board.
Grade 9 Lesson plan
Duskerton Road Salt and Skelbrook Chloride: Residuals and Fit
A 55-minute grade 9 lesson where students fit a least-squares line to six winters of road-salt and stream-chloride data, then read the residuals and the correlation.
Grade 9 Worksheet
Farnhollow Digester Biogas: Volume, Detention Time, and Energy
A grade 9 worksheet on a wastewater plant's anaerobic digester: cylinder volume, detention time, solids loading, and the electricity its biogas engine makes.
Grade 9 Lesson plan
Feldmere's Pennyquick Lane Main: Building an Exponential Decay Model
A 50-minute grade 9 lesson where students build an exponential model of chlorine residual along a dead-end water main and compare it against a linear guess.
Grade 9 Lesson plan
Garrowby Water Authority: Two Entry Paths as a System of Equations
A 55-minute grade 9 lesson where students model cumulative earnings for two routes into a water utility and solve the system for the year the totals meet.
Grade 9 Classroom activity
Northmill Meter Route: Converting Meter Readings to Gallons per Day
A grade 9 station-rotation activity where teams read six fictional water meters, convert CCF to gallons per day, and rank which address the leak crew should visit.
Grade 9 Worksheet
Quarrylea Dam Spillway: Reading a Head and Discharge Table
A grade 9 worksheet where students read a spillway rating table, compute rates of change across intervals, and convert discharge between cfs, MGD, and gpm.
Grade 9 Classroom activity
Sallowfield Farms Soil Moisture Rounds: A Six-Week Pivot Game
A grade 9 activity where teams run a fictional center-pivot field through six weekly rounds, holding stored soil water inside a band while applying as little as possible.
Grade 9 Lesson plan
Thrushmere Well Field Permit: Pumping Limits as Inequalities
A 50-minute grade 9 lesson where students write a system of inequalities for two wells' permit caps and test proposed pumping plans for viability.
Grade 9 Worksheet
Wickcombe's Ivyshaw Row Flush Test: Lead Against Liters Drawn
A grade 9 worksheet using a sequential flush profile from one home's lead service line to practice average rate of change and one-variable equations.
Grade 9 Project
Ambervale Irrigation District: A Water Budget Project
A grade 9 project for the fictional Ambervale Irrigation District, where teams model a season of water use as a constraint system within an allocation and budget.
Grade 9 Worksheet
Brindlemoor Pressure Zones: Elevation and PSI Worksheet
A grade 9 worksheet on the fictional Brindlemoor Water District, converting ground elevation to water pressure in psi across three streets with the 0.433 rule.
Grade 9 Math problem set
Caldbeck Treatment Plant: Alum Coagulant Dosing Problem Set
A grade 9 problem set using the pounds formula to size alum coagulant feed, plan bag supply, and stay within a fictional plant's pump and cost limits.
Grade 9 Math problem set
Copperton Booster Pump Station: Horsepower and Energy Cost
A grade 9 problem set that sizes a fictional booster pump in water horsepower, then works through kilowatts and daily and yearly pumping energy cost.
Grade 9 Quiz & test questions
Corriemoor Brook Storm Week: Flow Rates and Conversions
A grade 9 quiz on six days of fictional gauge readings, covering average rate of change, conversions among cfs, gpm, and MGD, and reading a storm rise.
Grade 9 Math problem set
Cravenshaw Meadows Detention Basin: Storage and Release
A grade 9 problem set applying the rational method to a fictional subdivision, then testing whether the detention basin fits the site under a depth limit.
Grade 9 Lesson plan
Delford's Two Wells: A PFAS Blending Equation Lesson
A grade 9 lesson where students write and solve a weighted-average blending equation to keep two fictional wells at or below the 4.0 ppt PFOA limit.
Grade 9 Worksheet
Draymoor Transmission Main: A Pipe Velocity and Flow Worksheet
A grade 9 worksheet using the continuity equation Q = A x V to find pipe velocity and flow in a fictional water district's transmission mains.
Grade 9 Worksheet
Dunmere Clarifier Testing: Removal Efficiency and Oxygen
A grade 9 water-testing worksheet at the fictional Dunmere plant, calculating turbidity removal efficiency and checking dissolved oxygen against a fish limit.
Grade 9 Worksheet
Fenwick PFAS Carbon Filter: Parts-per-Trillion Removal Worksheet
A grade 9 PFAS worksheet: students use percent removal and a linear breakthrough model to keep Fenwick's carbon filter below the parts-per-trillion limit for PFOA.
Grade 9 Math problem set
Ferncliff Dam: Reservoir Flow and Hydropower Energy
A grade 9 problem set at the fictional Ferncliff Dam, using Q equals A times V for penstock flow, converting cfs to gpm and MGD, and separating power from energy.
Grade 9 Quiz & test questions
Glenmara Treatment Plant: A Process Math Quiz
A grade 9 unit quiz on the fictional Glenmara plant, with computation and multiple-choice items on detention time, filter loading, removal efficiency, and dosing.