ABSTRACT
In 2009,Visible Learning was published.This was the culmination of many decades of work – finding, reading, and analysing meta-analyses. I recently spoke in Seattle to a group of educators about this work. It was like a return to the beginning: my search began there in 1984, when I was on sabbatical at the University of Washington. In many cases, as part of researching the meta-analyses, I went back to the original articles,wrote separate articles on themes, and spoke to many groups about the meaning of these analyses. Always, the question was: ‘So, what does all of this mean?’ Addressing this question is the reason the book had a long gestation.The aim of Visible Learning was to tell a story, and in most cases the reviews and reactions indicate that the story has been heard – although, as expected, not always agreed with.
