Discovery learning with computer simulations is a demanding task for many learners. Frequently, even fostering systematic and goal-oriented learning behavior does not lead to better learning outcomes. This can be due to missing prerequisites such as the coherent mental integration of different types of representations comprised in the simulations and in the surrounding learning environment. Prior studies indicated that learning performances can be enhanced by encouraging learners to interactively and externally relate different static sources of information to each other before exploring dynamic and interactive visualizations. In an experimental study addressing the domain of mechanics it was largely confirmed that the active external integration of representations can improve simulation-based learning outcomes.