Discussed are the influences of a student's gender, grade level, country of origin, and urban/rural environment in performance of proportional and combinatorial Piagetian tasks. (Author/SA)

The development of children's causal knowledge is investigated by analyzing changes in the content and form of the explanations they generate across the age span of three to nine years. The balance of incremental versus fundamental change and the forms each takes in children coming to understand the working of gears are examined. Three phases of…

Reports a study that investigated the relationship among (1) teacher's attitudes and implementation of inservice workshop developed learning cycle science materials, and (2) elementary school student's conservation reasoning and language used to describe properties of objects. Data were gathered from 100 students from grades K-5 and 16 teachers…

Reports on a study which investigated the order of acquisition of intuitive notions of qualitative speed. Results indicated that an array of prerequisites, equivalent, and independent relationships existed among the tasks administered. Confirmed the evolution of reasoning for notions of qualitative speed found by Piaget. (Author/TW)

Compared is an inquiry-oriented Biological Sciences Curriculum Study (BSCS) style laboratory approach with a more directive traditional approach on student outcomes in the cognitive and affective domains of learning. Differences in science achievement, reasoning ability, attitude, and stages of development are discussed. (KR)