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.
The book was based on 800 meta-analyses (a statistical analysis that combines the results of multiple studies) of 50,000 smaller studies. It found that, among six groups of factors influencing successful learning in schools - the student, home, school, teacher, curricula and teaching – teachers seemed to have the strongest in-school effect.
