Tracing the path from a numerical Riemann sum approximating the area under a curve to a definite integral representing the precise area in various texts and online presentations, we found 3 semiotic registers that are used: the geometric register, the numerical register, and the symbolic register. The symbolic register had 3 representations: an…

The study in this article examines and illustrates the intertextual meanings made by a group of high school science students as they embarked on a knowledge building discourse to solve a physics problem. This study is situated in a computer-supported collaborative learning (CSCL) environment designed to support student learning through a science…

This paper reports on a study that consists of the analysis of the discourse of mother-child dyads (N=32) as they interacted during the performance of three science activities that increased in difficulty. Partial dialogues of three high achieving dyads during the solution of the task are presented and examined for evidence of semiotic uptake. The…