Gordin and Pea (1995) argued that some of the main advantages of the use of computers for instruction are the possibility to represent phenomena as a sequence of ani- mation, adding a temporal component; the possibility to manipulate data sets, and to test the impact of the manip- ulation (Windschitl 1998), and increasing students’ motivation. Matray and Proulx (1995) claimed that ani- mated software can illustrate and elucidate biological concepts more clearly and effectively than more traditional means—lecture, discussion or even conventional labora- tory activities.