The heart of learning chemistry is the ability to connect a compound's structure to its function; Lewis structures provide an essential link in this process. In many cases, their construction is taught using an algorithmic approach, containing a set of step-by-step rules. We believe that this approach is in direct conflict with the precepts of…

Reports a study that tracks the changes in children's ideas about science and scientific concepts through the use of interviews and questionnaires. Students respond to seven questions about science learning, scientists, and their future relationship to science. (DDR)

Investigates the effectiveness of two different types of interviews: one that embeds a concept map, and one that does not embed a concept map in order to elicit post-instructional understandings. Focuses on students' understandings of chlorofluorocarbons and their role in global atmospheric change. Contains 71 references. (DDR)

Reviews research on children's ideas about floating and sinking. Describes the Model-Assisted Reasoning in Science (MARS) project curriculum and student responses to a question about helium balloons. Contains 61 references. (DDR)

Argues that inventions are of the utmost importance in knowledge development, and that conventions play an important role in inventions by providing support for their development. This position borrows from Piaget's perspective regarding figurative and operative aspects of thought. Contains 22 references. (DDR)

Parameter passing is the mechanism by which various program modules share information in a complex program; this paper was a study of novice programmers' understanding of the parameter construct. The bulk of the data was collected from interviews with eight college students enrolled in a state university introductory computer programming course.…