Grade 7 Lesson plan
Tollbury's Beach Closure Record: A Grade 7 Sampling Lesson
A 50-minute grade 7 math lesson where students estimate a summer's beach closure rate from five random samples of a fictional lake's 60-day record.
Common Core Math · Grade 7
7.SP.A.1 Understand random sampling and representative samples
Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population.
Why water teaches this standard well
Students evaluate whether testing water from just one household tap can fairly represent contaminant levels across an entire distribution system, or whether the sampling plan needs to be broader. This is the reasoning behind every real water-quality compliance sampling program.
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.
12 materials aligned to 7.SP.A.1
Lesson plans
Grade 7 Lesson plan
Ballantry School Taps: A Lead Sampling and Retrofit Plan
A grade 7 lesson where students build a proportional sampling plan for a fictional school's drinking taps, infer how many exceed the action level, and size a retrofit.
Grade 7 Lesson plan
Sampling the Trace Line Water System: A Grade 7 Statistics Lesson
A 45-minute grade 7 lesson where students compare two water-sampling plans across four zones and calculate how well each plan represents the full system.
Worksheets
Grade 7 Worksheet
Brackham's Lead Samples: Reading a 10-Home Tap Test
A grade 7 science worksheet: students read lead results from 10 homes, find the percent above the action level, and judge if the sample fits the town.
Grade 7 Worksheet
Calder Bluff's Service Line Inventory: Which Pipes Come Out First
Students sort a fictional town's 6,000 service lines by material, find percents, and build a ten-year lead pipe replacement schedule with costs.
Grade 7 Worksheet
Is One Tap Enough? Sampling Rowan Springs' Water Supply
A grade 7 worksheet on representative sampling and federal testing rules, using a fictional city's lead and turbidity monitoring program and real EPA thresholds.
Math problem sets
Grade 7 Math problem set
Blue Heron Creek: What a Five-Site pH Sample Can and Can't Tell You
A grade 7 math set using a fictional creek's pH sampling data to practice mean and range, then reasons about how well a small sample represents a waterway.
Classroom activities
Grade 7 Classroom activity
Redfern Reservoir Sampling: A Representative-Sample Simulation
A grade 7 science activity where students draw bead samples from a model reservoir to see why water monitoring needs random, representative samples, not one biased scoop.
Grade 7 Classroom activity
Sampling the System: A Tanner's Bend Water-Testing Game
A grade 7 activity where student teams draw tap samples across a fictional town to learn why one sample can't judge a whole system's water quality.
Projects
Grade 7 Project
Marchbank Township's Private Well Survey Project
A four-session grade 7 project where students judge a sampling plan, estimate from a fictional township's 30 well tests, and report to its board.
Quizzes & test questions
Grade 7 Quiz & test questions
Cattail Bend Water Testing: A Grade 7 Sampling Quiz
A grade 7 quiz mixing multiple-choice, short-answer, and computation items on random sampling, inference, and probability for a fictional lake's water tests.
Graphic organizers
Grade 7 Graphic organizer
From Tap to State Report: Tulloch Creek's Sample Chain
A grade 7 careers organizer tracing a drinking water sample through six steps and the job behind each at a fictional utility, with an exemplar and a sampling question.