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Kral, William Kevin – 1972
This study investigated the effects of the addition of a supplemental science program to existing curricula in selected elementary schools. A supplemental science program, the Elementary Science Study (ESS), was introduced to the treatment group (four of eight classes randomly selected, with a total population of 189 sixth-grade students) and a…
Descriptors: Academic Achievement, Curriculum, Doctoral Dissertations, Educational Research
