『教育の効果：メタ分析による学力に影響を与える要因の効果の可視化』（図書文化社・2018年）として邦訳されたVisible Learningの続編。When the original Visible Learning published in 2008 it instantly became a publishing sensation. Interest in the book was unparalleled; it sold out in days and was described by the TES as revealing "teaching" s Holy Grail'. Now John Hattie returns to this ground-breaking work. The research underlying this book is now informed by more than 2,100 meta-analyses (more than double that of the original), drawn from more than 130,000 studies and involving more than 400 million students from all around the world.