Class 3 — Timelines, ranking, and cause-effect chains

Arrange events in sequence, identify missing steps, and recognise reversible versus irreversible sequences.

Rank items by a property using transitivity and data tables, and find the median and tied values.

Apply double conditions, chain if-then statements together, and use counter-examples to break invalid rules.

Trace a chain of events where each effect becomes the next cause, and identify the root cause.

Follow and create multi-step instructions with embedded conditions, and begin algorithmic thinking.