Texas TEKS 8.2.B

Science8th GradeScientific and engineering practices

The Standard

analyze data by identifying any significant descriptive statistical features, patterns, sources of error, or limitations

Texas Essential Knowledge and Skills for Science

Teacher's field guide

What Students Need to Do: Students calculate useful summaries such as mean, median, and range. They find trends, clusters, and outliers, then explain possible errors and limits in the data.
What Mastery Looks Like: A student chooses and calculates an appropriate summary correctly. They support a pattern with specific values and explain how an error source or limitation could affect the conclusion.
Common Misconceptions: Students may treat every outlier as a mistake or confuse range with a trend. They may name vague errors, ignore small sample sizes, or claim that a pattern proves cause and effect.
How to Assess It: Exit ticket: For trial results 2, 3, 3, 4, and 12 cm, calculate the mean and range, identify one pattern or outlier, and state one possible error source and one limitation.

Lesson moves

Measure cooling water at one-minute intervals, graph class results, compare ranges and outliers, then trace inconsistent readings to measurement choices.
Give pairs two plant-growth data tables and ask, "Which conclusion is best supported, and what feature or limitation affects your confidence?"
Run a data-detective card sort matching graphs to labels for trend, cluster, outlier, measurement error, sampling error, and limited sample size.
Compare one week of temperatures from two weather apps, calculate differences, and discuss station location, update time, and rounding as limitations.

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A ready-to-print activity worksheet aligned to 8.2.B, with an answer key for the teacher on its own page. No account needed.

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