PreK Elements that Increase Third Grade Achievement

In this document we summarize results from analyses of two sets of effectiveness elements, the Bill & Melinda Gates Foundation’s 15 essential elements9 (Gates-15) and the Child-Parent Center 21 elements10 (CPC-21; Tables 2 and 3). Both are based on a synthesis of evidence, although the CPC elements derive from life-course results of one of the most established public PreK programs as well as principles of school reform. The two questions are (a) whether 3rd grade achievement gains are greater as the number of elements increases and (b) which particular elements are most associated with gains.

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