Describes longitudinal study of the development of understanding of two logical properties of number by 36 children during the first three years of primary school in Glasgow. Piagetian tests and number skills tests were administered to explore the acquisition of number as class and number as order concepts. (Author/LRW)

Down Syndrome children (N=229), aged 1-83 months, from Australia, Canada, and Germany were tested using the Bayley Scales of Infant Development. Test performances on the Bayley's Mental and Motor scales were not dissimilar, leading to the conclusion that young Down Syndrome children from different countries with relatively comparable standards of…

This review of research on computer use in education focuses on the development of higher order thinking skills and the effects of programming instruction. Eight hypotheses are proposed to account for the general failure of the research to confirm the expectations, and a new programming language, Prolog, is described. (70 references) (Author/LRW)