Dataset construction
Data Detective
Adjust a real five-value dataset to meet mean, median and range constraints.
6 missions · Developing · Untimed
Statistics & probability
Descriptive statistics and equally likely sample spaces.
3 activities · 18 guided missions · No account needed
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Probability experiments
Chance Lab
Count an event’s outcomes, predict its probability, then run reproducible virtual experiments.
6 missions · Developing · Untimed
Applied reasoning
Data Detective
Six applied problems with plausible alternatives and worked explanations.
6 missions · Stretch · Untimed
Practice, with a little more purpose.
Work without a countdown. Try the model, use a hint, then read the explanation. Checkpoints and practice records stay on your device. Teaching tools create shareable activity playlists and printable worksheets with answer keys.
These are original practice activities, not an accredited course or a secure assessment. Difficulty labels are editorial, not formal grade alignment. Science activities use explicitly simplified models. Playing requires JavaScript; this directory does not. See each activity's reference and model limits.