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.2 Draw inferences from random samples
Use data from a random sample to draw inferences about a population with an unknown characteristic of interest, generating multiple samples to gauge the variation in estimates.
Why water teaches this standard well
Students use random water-quality samples drawn from several points on a river to estimate a contaminant level for the whole watershed, then compare multiple simulated samples to see how much the estimate varies. This is the statistical backbone of real river and drinking-water monitoring programs.
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.
9 materials aligned to 7.SP.A.2
Lesson plans
Grade 7 Lesson plan
Thistlewood Reservoir: Why Algal Blooms Crash Oxygen at Dawn
A grade 7 lesson using a fictional reservoir's oxygen readings across a day to explain how nutrient pollution fuels algal blooms and a dawn oxygen crash.
Math problem sets
Grade 7 Math problem set
Verdon Water District Sampling: Probability and Percent Problems
A grade 7 science problem set where students use a water district's sample results to find probabilities, percents, and predictions, and to reason about sample size.
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
Sampling Bittern Slough: A Grade 7 Random-Sample Activity
A grade 7 activity where groups draw repeated random chips from a hidden population to estimate a fictional river's contamination and see how sampling varies.
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.
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.
Grade 7 Quiz & test questions
Willow Creek Water Quality Monitoring Assessment
A grade 7 science assessment on dissolved oxygen, pH, and sampling design, using data from two fictional Willow Creek monitoring sites to test water-quality reasoning.