Critical thinking when engaged in science problem solving around even simple tasks such as the Piagetian volume conservation task is a complex endeavor. Tasks such as the conservation task often require the interaction of multiple cognitive systems. Parity judgment, retrieval, and lateral thinking are three examples of such systems interacting…

Argues that worksheets are limited teaching tools because they do not address preschoolers' developmental needs such as hands-on play. Presents characteristics of early learning that can be facilitated by play, which fosters children's social and language development, physical skills, and creative and critical thinking. Suggests that learning can…

A 1-year lag was found between the effect of an intervention intended to promote formal operational thinking in students initially 11 or 12 years of age and the appearance of substantial science achievement in the experimental groups. A one-year lag on cognitive development and an age/gender interaction were also reported. (Author/KR)