The ten chapters used here
Rights and Responsibilities; Who We Are; Canada's History; Modern Canada; How Canadians Govern Themselves; Federal Elections; The Justice System; Canadian Symbols; Canada's Economy; and Canada's Regions. The practice bank has 180 original questions spread across those chapters, with an explanation and a chapter reference for every question.
How to use the chapters
Read a chapter in Discover Canada first, then practise that chapter in practice mode. The explanation after each question points back to the chapter topic, so a wrong answer becomes a study note, not just a lost point.
Then take the mock test
The mock test on this site uses 20 questions drawn at random across all chapters, with a target of 15/20. That format is a target format to be confirmed against the current official IRCC information on canada.ca / IRCC. Note that some third-party summaries list different chapter groupings; the ten-chapter structure above is the one used for the practice bank.