In 2015, researcher John Hattie updated his seminal research Visible Learning. Hailed as “teaching’s Holy Grail,” 1 Hattie synthesized 15 years of research on more than 800 meta-analysis about what ...
Hattie's work is based on his meta-analysis of more than 1,000 research reviews comprising more than 50,000 individual studies--the largest meta-analysis ever conducted in the field of education.
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