Engaging students in conversations around science and engineering design can be challenging. Sparking such conversations during field trips at an interactive science center has additional challenges. First, students vary considerably in age from day to day: science center employees might work with first graders one day and sixth graders the next.…

With the help of the National Science Foundation, the Department of Mathematics at the University of Puerto Rico in Mayaguez has developed a set of manipulatives to help students of science and engineering visualize concepts relating to points, surfaces, curves, contours, and vectors in three dimensions. This article will present the manipulatives…

This paper introduces various visual models for the analysis and description of learning processes. The models analyse learning on two levels: the dynamic level (as a process over time) and the functional level. Two types of model for dynamic modelling are proposed: the session trace, which documents a specific learner in a particular learning…