Older college students ought to mannequin phenomena as techniques, with rules governing the interactions within the system. Students should analyze and evaluate these fashions towards real-world observations. For example, students may create a easy producer–consumer ecosystem model using a programming software. Eventually, they might progress to creating extra complex and sensible interactions between species, such as predation, competition, or symbiosis, and evaluate the mannequin based on information gathered from nature. At any level, college students ought to recognize that users of expertise have totally different needs and preferences and that not everyone chooses to make use of, or is in a position to use, the same know-how merchandise. For example, younger learners, with trainer steerage, would possibly evaluate a touchpad and a mouse to examine differences in usability.