Grade band: 7
Lesson purpose
Explore statistics through hands-on data collection, prediction, averages, checking strategies, and graphing. Students use collaborative data tools, spreadsheets, graphs, and reflection to turn observations into clear mathematical stories.
Learning objectives
- Calculate mean, median, mode, and range accurately.
- Collect, organize, and display data in tables and graphs.
- Use a sample to make and test a prediction.
- Explain how outliers and changes in data affect statistical measures.
- Work collaboratively and justify conclusions with evidence.
Teacher preparation
Prepare a few harmless classroom measurement experiments such as water-drop capacity with droppers, handful counts of classroom-safe objects, or response-time tasks. Prepare a spreadsheet template and graph choices.
Lesson sequence
- Prediction experiment: Teams predict a measurable outcome, collect repeated trials, and enter the results into a shared table.
- Central tendency: Students calculate mean, median, mode, and range and discuss which measure best describes the data.
- Graphing lab: Students create at least two graph types and explain what each graph reveals well and what it may hide.
- Outlier challenge: Add or remove an extreme value and recalculate the measures. Students write what changed and why.
- Data story: Groups present a short claim-evidence-reasoning explanation using their graphs and calculations.
Student product
A complete data investigation with raw data, calculations, graphs, prediction, and written interpretation.
Assessment
Accuracy is necessary, but interpretation carries equal weight. Score calculation, display, prediction, evidence, and explanation separately.
Differentiation & accessibility
Provide calculator support, partially completed tables, worked examples, and partner roles. Advanced students can compare the same data using different samples or graph types.
Technology integration
Use any currently available classroom tools that fit the task: a learning-management system or shared folder, presentation software, spreadsheet/charting tools, digital maps, classroom cameras, audio/video recording, interactive whiteboards, or accessibility features such as speech-to-text and text-to-speech. The activity should remain instructionally sound even when a particular brand or platform changes.