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Visible Learning, Tomorrow’sTomorrow’s SchoolsSchools, TheThe MindsetsMindsets that make the difference in Education John Hattie Visible Learning Laboratories University of Auckland InfluencesInfluences onon AchievementAchievement ?? 00 DecreasedDecreased ZeroZero EnhancedEnhanced ReducingReducing ClassClass SizeSize onon Achievement?Achievement? What is the effect of reducing class size HundredsHundreds ofof evaluationsevaluations ofof reducingreducing class size …. 00 DecreasedDecreased ZeroZero EnhancedEnhanced EffEffectt on AAchihievementt over titime?? Reducing Class Size 00 .2020 1.0 Decreased Zero Enhanced An effect‐size of .20 1.0 advancing achievement 9 mths 3 yrs %% imprimprovingoving rarattee ofof learninglearning 10%10% 45%45% r variable & achievement .10 .45 % of students with treatment exceeding those notnot trtreaeatteded 88 3434
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