Learning environment that facilitated the acquisition and expression of procedural skills in LOGO was set up for children in the 10- to 12-year range. Ten participants were placed in a series of situations that required them to manipulate programing procedures in LOGO. Analysis of children's behavior revealed their competence in manipulating…

Divided into two parts, this article analyzes why some pupils feel reserve about instantaneous velocities and instantaneous flows. The second part relates reactions of pupils facing a problem that implicates the instantaneous rate of change. Describes some characteristics of this problem that enables the authors to explain its instructional…

Reports results of a study investigating effects of social interaction on utilization of categorical concepts by upper and lower class children. Describes an experimental guessing game with individual subjects and pairs of subjects. Concludes that the experimental setup was beneficial for all subjects regardless of social background or kind of…