“…As in the objectivistic tradition, where developments were followed and encouraged by the computer based learning environments, such as programmed instruction, tutorials, and drill and practice programs (Alessi & Trollip, 1985), also within the constructivistic approach we find computer learning environments that help to advance developments. Examples are hypertext environments (see e.g., Gall & Hannafin, 1994), concept mapping environments (see e.g., Novak & Wandersee, 1990), simulations (De Jong, 1991;Reigeluth & Schwartz, 1989), and modeling environments (e.g., diSessa & Abelson, 1986;Riley, 1990;Smith, 1986).…”