Abstract
Taking advantage of the rapid evolution of educational technology, simulations and games have been embodied in a variety of teaching and learning procedures. Their effectiveness, in common with the effectiveness of all instructional design, to a large extent, relies on how material and activities are optimally organized. That organization should be determined by the nature of human cognitive architecture when dealing with complex, biologically secondary information. Cognitive load theory has been devised to deal with such knowledge. Therefore, embodied simulations and games should take evidence-based cognitive load principles into account.