Scientific practices · Interactive activity

Graph & Variables Challenge

Step into a set of classroom case files: sort variables, inspect graphs, spot fair-test moves, and choose the strongest evidence-based conclusions. The activity stays free, while companion teacher materials can extend the same target skills offline.

What you'll do

This challenge is built as a data detective game, not a traditional quiz. You will work through short investigation case files, classify parts of an experiment, read graphs and tables, and defend the best claim the evidence can support.

Learning targets

  • VariablesIdentify independent, dependent, and controlled variables in an investigation.
  • Fair testsRecognize controls, constants, and design choices that make a test stronger.
  • Read dataInterpret trends, comparisons, and key points in graphs and tables.
  • ClaimsSelect conclusions that match the available evidence without overclaiming.
  • Improve designDiagnose weak investigations and choose the best next step.
Set up a fair test

Sort the setup

Assign variables and controls to the right role so the experiment starts as a fair test.

Read the data

Read the graph

Click the strongest evidence in the data display instead of just reading a question and guessing.

Make a claim

Choose the best claim

Use the data like a scientist: support what the evidence shows and avoid saying more than the data can prove.

Start the investigation

Four short case files, scored by learning target, with a mastery summary and optional completion code at the end.

Teacher note

This activity is intentionally free and student-facing. The companion pack is designed to add printable practice, answer keys, extension tasks, and optional mastery-tracking tools without making the core experience paywalled.