![]() School Factors related to school-type, pre-school, school composition, and leadershipĬlassroom Factors related to class composition, giftedness, and classroom influences Home Factors relating to family resources, structure, and environment Student Factors relating to background, beliefs, and physical influences.Any factor that has an effect size above 0.4 has an even greater positive effect on student learning.Įach of these factors have been categorized into one of nine domains ![]() The average effect size of these 320 factors was 0.4, a marker that can be shown to represents an (average) year's growth per year of schooling for a student. He then set about calculating a score or "effect size" for each, according to its bearing on student achievement. ![]() Through the Visible Learning research, John Hattie has identified more than 320 factors that influence student achievement. The Visible Learning ® research base is the culmination of his quest over the past 25 years to answer this question and represents more than 1,850 meta-analyses comprising more than 108,000 studies involving more than 300 million students around the world. ![]() When Professor John Hattie first began his research around performance indicators and evaluation in education, he had one simple question: which variables have the greatest impact on student achievement? ![]()
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