Abstract electronics concepts are difficult to develop because the phenomena of interest cannot be readily observed. Visualisation skills support learning about electronics and can be applied at different levels of representation and understanding (observable, symbolic and abstract). Providing learners with opportunities to make transitions…

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.…

Constructing a data model for a problem area requires identifying and formulating some symbolic representation of the concepts involved, their characteristics, and the relationships between them. Taking a socio-cultural perspective on learning, analysis of classroom dialog is used to identify cognitive challenges met by novice students of data…