Grade 10 Lesson plan
Brackenmoss Wells: Estimating Nitrate With a Margin of Error
A 55-minute grade 10 lesson where students estimate a fictional district's mean well nitrate from a random sample and build a margin of error by simulation.
Common Core Math · High School
HSS-IC.A.1 Understand statistics as inference from a random sample
Understand statistics as a process for making inferences about population parameters based on a random sample from that population.
Why water teaches this standard well
Students treat a set of tap samples collected from across a city as a random sample used to infer the true citywide lead level, rather than assuming every tap matches the sampled ones exactly. This inferential framing is the statistical basis for real Lead and Copper Rule compliance sampling.
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.
7 materials aligned to HSS-IC.A.1
Lesson plans
Grade 11 Lesson plan
Grover Mill Lead Sampling: Ranking Taps to the 90th Percentile
A grade 11 lesson where students rank a fictional district's tap lead results, find the 90th-percentile value, and test it against the current and 2027 action levels.
Grade 9 Lesson plan
Marrisford's Lead Sampling: Finding the 90th Percentile
A grade 9 lesson where students order twenty fictional tap-water lead results, find the 90th percentile the way the rule does, and test it against the limit.
Classroom activities
Grade 11 Classroom activity
Thistlewood Well Field Sampling Relay: A Sampling Distribution
A grade 11 activity where teams draw repeated random samples from a fictional well field to build a class sampling distribution and estimate its spread.
Quizzes & test questions
Grade 11 Quiz & test questions
Colwyn Flats Rebate Survey: A Grade 11 Sampling Quiz
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.
Grade 12 Quiz & test questions
Amberton County Nitrate Sampling: A Statistical Inference Quiz
A grade 12 quiz on a fictional county's nitrate monitoring, testing sampling-as-inference reasoning and the evaluation of a biased water-quality report.
Grade 12 Quiz & test questions
Kelverton Well 3 PFAS Compliance: Averages and Precision
A grade 12 quiz on PFAS compliance math: the running annual average, comparison to the 4.0 ppt limit, blending, reporting precision, and the rule's compliance timeline.