Dataset preparation
Dataset preparation is the unglamorous majority of the work — cleaning, joining, checking and documenting.
A dashboard that looks authoritative and misleads is worse than no dashboard.
Students prepare a dataset properly, design visual analysis that answers a real question, and interrogate their own dashboard for the claims it implies but cannot actually support.
Decision-makers act on dashboards. Designing them honestly is an ethical responsibility, not just a design task.
Three core ideas, each taught with worked examples and then practised until it feels obvious.
Dataset preparation is the unglamorous majority of the work — cleaning, joining, checking and documenting.
Visual analysis means choosing the chart that answers the question, with honest scales and visible sample sizes.
Avoiding false claims means checking what a viewer will conclude, not merely what you technically stated.
A well-designed dashboard is judged by the decisions it improves, not by the number of charts it contains.
“More metrics means more insight.” Too many metrics hides the important one. Most good dashboards answer three questions well.
Sessions 25–32 of the 72-session year, at two one-hour sessions per week.
Where this module fits, what you will build, and a hands-on starter that gets everyone curious about dataset preparation.
Guided teaching on dataset preparation, worked through together with the teacher.
Independent practice, small challenges and one deliberate mistake to diagnose.
Guided teaching on visual analysis, building directly on the previous two sessions.
Applied tasks that combine dataset preparation and visual analysis in one piece of work.
Avoiding false claims introduced and practised, completing the toolkit needed for the project.
Guided build session for the module project: Evidence-based decision dashboard concept.
Finish, test against the checklist, present the work and explain the decisions behind it.
Every module ends with something the student built themselves and can demonstrate. This is the piece that goes into their portfolio and gets explained out loud at the end of session 32.
Show your dashboard to someone for thirty seconds, then ask what they concluded. If it is wrong, the dashboard is wrong.
Students finishing Module 4 can:
The vocabulary introduced here, in plain language:
6 quick questions drawn from this module — vocabulary, the project you build, and a myth-or-fact round. Every wrong answer explains itself, so a mistake still teaches you something.
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