Described is the development and validation of a test designed to assess the cognitive levels of Jamaican sixth graders. Instead of the usual clinical procedure, a 30-minute videotaped test was designed in order to standardize variables associated with the test's administration. The film presented situations involving seven conservation concepts…

Describes an analysis of test items used to measure the science process skills of 11-year-olds in Great Britain. Concludes that the level of cognitive demand was a reliable predictor of the difficulty of an item. (TW)

The purpose of this project was to find and make clarifications about the uniqueness and similarities on various aspects of science education programs in Japan, the Republic of Korea, the United States, and the Philippines that could provide the basic considerations on curriculum development. Included are: (1) an introduction to the research; (2)…

The concept of the density of a material has an important role in elementary and secondary school science curricula, but it is a difficult concept to grasp. This project explores why this should be and whether there are some simpler, more accessible notions which can serve as the basis for building a concept of density in students' minds during…