Declining effects of pre-school interventions

Apropos of Prof. Ray Wolters’ article on his journey to race realism, this chart from James Thompson’s blog shows the decline in effect sizes of pre-school interventions over recent decades. In other words, since the optimistic 1960s, there is less and less evidence that pre-school interventions have any effect. Back to the drawing board on what to do about raising academic achievement. Thompson


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