문제 해결
Generally problem solving adopts a very procedural approach. Problem solving in the areas of science, technology, engineering and mathematics (STEM) has been highly procedural. The best approach so far is to teach these procedures through instructional text accompanied by specific worked examples. The role of instructional text is to define and describe the problem solving procedures whereas how to apply these procedures is shown through worked examples. Students can learn from step-by-step approach of worked examples which later can be helpful to them in solving similar problems on their own. Novices, however, often find it difficult to distinguish domain specific information and the information specific to solving that problem, which increases their cognitive load. This cognitive load can be reduced by use of subgoal labeling which is achieved by grouping functionally-similar steps under a label that describes that function. This approach can be helpful to students to form a mental model of the domain related problem which later can guide them to solve different problems in that domain. Understanding the structure of worked example can help students identify the similarities between different problems thus encouraging self-explanation and learning.