Reasoning-and-proving in geometry in school mathematics textbooks in Japan.

Highlights: [•] We analyse the geometry chapters of a Grade 8 mathematics textbook from Japan. [•] The emphasis in the textbook is on ‘direct’ proofs of geometrical statements. [•] The textbook helps students construct suitable proofs. [•] Students may not fully appreciate the necessity or generality of mathematical proof. [Copyright &y& Elsevier]