Data analytics & AI — play, learn, earn certificates
The skills the job market is moving to — reading data, statistics, analytics and using AI tools well. Six fields, four tiers each. Play free, pass a tier, and earn a certificate of competence you can download, print and share. New questions appear each time you play.
You can play as a guest — sign in with your free 21 ID to keep progress and claim certificates.
Read the data — the six fields
Build the skills the job market is moving to — reading data, statistics, analytics and using AI tools well. Each field you master is a certificate you can show.
Data foundations
What data is, its types, how it sits in tables, and why clean, accurate data comes first.
Statistics & probability
Averages, spread, distributions and probability — and telling correlation from causation.
Data visualisation
Choosing the right chart, making it clear, and spotting a misleading one.
Analysis & interpretation
Finding trends and segments, drawing sound conclusions and avoiding sampling bias.
Using AI tools well
Prompting, checking the output, spotting hallucinations and knowing when to trust an AI.
Data ethics & privacy
Bias, privacy and GDPR, and using data and AI responsibly.
Data to decisions
Climb a data career — from cleaning your first dataset to leading data and AI for a whole business.
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