Common Core Math · High School
Recognize the purposes of and differences among sample surveys, experiments, and observational studies; explain how randomization relates to each.
Why water teaches this standard well
Students distinguish a water utility's routine compliance sample survey from a controlled experiment testing a new treatment chemical, explaining why randomizing sampling sites or treatment assignment matters for each. This distinction is exactly what separates a valid water-quality study from a misleading one.
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.
Grade 12 Lesson plan
A grade 12 health lesson in which students use survey data to compute attack rates and relative risk, trace a parasite outbreak to tap water, and test a rival claim.
Grade 11 Lesson plan
A 60-minute grade 11 careers lesson in which students act as a conservation analyst, estimating rebate savings with a comparison group and sorting study designs.
Grade 11 Lesson plan
A grade 11 lesson comparing runoff from twelve fictional parking bays with a randomization test, using a supplied simulation to estimate a p-value.
Grade 12 Lesson plan
A 55-minute grade 12 lesson using a fictional plant's jar test to compare two coagulants, then a randomization simulation to judge whether the difference is real.
Grade 11 Worksheet
A grade 11 worksheet testing a utility's proportional flushing model against turbidity results from eight main segments, then planning a controlled follow-up trial.
Grade 10 Classroom activity
A 50-minute grade 10 activity where students shuffle result cards from a fictional two-dose jar test to judge whether a 1.00 NTU difference could come from chance alone.
Grade 11 Classroom activity
Grade 11 students draw candidate advisory icons for a fictional coastal town, then run a randomized blind comprehension test on classmates and revise from the tallies.
Grade 11 Project
Teams audit every school fountain, survey a random sample of students, estimate tap-water use with a simulated margin of error, and pitch a budgeted plan.
Grade 11 Project
A grade 11 project where teams evaluate a fictional bottled-water company's statistical claims against real EPA lead action levels over three sessions.
Grade 11 Quiz & test questions
A 30-point grade 11 quiz on a fictional utility's rebate survey, covering study type, response rate, margin of error, sample size, and nonresponse.