Grade 7 Lesson plan
Wexbury Lead Tap Tests: A Grade 7 Probability Lesson
A 45-minute grade 7 lesson where students turn a fictional town's lead-test results into a probability between 0 and 1 and read what that risk means.
Common Core Math · Grade 7
7.SP.C.5 Understand probability as a number from 0 to 1
Understand that the probability of a chance event is a number between 0 and 1 that expresses the likelihood of the event occurring, with larger numbers indicating greater likelihood.
Why water teaches this standard well
Students assign a probability that a randomly chosen household's tap sample will exceed a lead action level, based on the share of citywide test results that have exceeded it in the past. Framing a contamination risk as a probability between 0 and 1 is how real water-quality reports communicate risk to the public.
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10 materials aligned to 7.SP.C.5
Lesson plans
Worksheets
Grade 7 Worksheet
Ashfold County's Private Well Screening: Probability Worksheet
A grade 7 worksheet where students turn a fictional county's 400 private well test results into probabilities, predictions, and a percent change after filters.
Grade 7 Worksheet
Harwick's Lead Tap Test: Sampling and Probability
A grade 7 worksheet using a fictional town's lead tap results to find the probability a random tap exceeds the action level and decide what to do.
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.
Classroom activities
Grade 7 Classroom activity
Contamination Odds: A Grade 7 Water-Sample Probability Game
A grade 7 card-draw game where student groups calculate experimental and theoretical probabilities of contamination for two fictional water systems.
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
Byrne Hollow Farm Irrigation Records: A Grade 7 Math Quiz
A 25-point quiz on one fictional farm's records, mixing complex-fraction pump rates, percent decrease in nitrogen runoff, and a probability drawn from field samples.
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
Selwyn Household Water Use: A Grade 7 Rates and Percent Quiz
A grade 7 quiz on the fictional Selwyn household, mixing multiple-choice, computation, and a probability item across percent and unit-rate reasoning on daily water use.
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.