The book was based on 800 meta-analyses (a statistical analysis that combines the results of multiple studies) of 50,000 ...
Education expert John Hattie’s new book draws on more than 130,000 studies to find out what helps students learn
In 2008, I published my book Visible Learning, which aimed to explain what works best to help student learning. At the time, others claimed it was the world’s largest evidence-based study into the factors that improve learning.