Abstract
The effects of three types of advance organizer lessons containing high-order social studies concept (AO1), high-order rules for hierarchical classification (AO2), or both (AO3), on the learning of social studies concepts and hierarchical classification (as defined by Piaget) were evaluated for a sample of 237 rural children in kindergarten, third, and fifth grades. The overall order of training effect was AO3 → AO2 → AO1 → C. Effects on delayed posttests and or transfer tasks are also presented.
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