Fourth move — reviewing

Once the write-up is finished, do not close your exercise book. There is one last stage — the one that distinguishes those who learn from those who merely hand in: checking the result, reflecting on the method and trying to extend the problem. This section illustrates it on the two guiding problems and closes with the habit of the “working diary”.

• Three things to do at the end
• Example — reviewing the rectangle problem
• Example — reviewing the angle-bisector proof
• The working diary