Metacognitive belief can be put into three categories: person knowledge, task knowledge, and strategy knowledge(Wenden 1991). Person knowledge refers to general knowledge about how human beings learn and process information, and individual knowledge of one’s own leaning processes. Learners need to understand their own cognitive capabilities, and to know in which particular areas they are generally competent and skilful. They need to know how to compensate for deficiencies. Task knowledge includes knowledge about the nature of the task and the type of processing demands. Learners need to know the purpose and the nature of the tasks. Strategy knowledge includes knowledge about both cognitive and metacognitive strategies and conditional knowledge about when and where it is appropriate to use strategies. It can lead learners to select, evaluate and revise cognitive tasks, goals, and strategies in the light of their relationship with one another and with their abilities and interests (Flavell, 1979). Learner may deliberately call upon their metacognitive knowledge when the learning task is new and incomplete (Wenden, 1999).