Knowledge of content and students (learners) refers to the knowledge the teacher should have about the typical mistakes that learners make and how learners at a specific age construct knowledge (Ball & Bass, 2009). Knowledge of content and teaching refers to knowledge of the sequences that the teacher uses to introduce a new concept or method to learners of a specific age group (Ball & Bass, 2009). Knowledge of the curriculum refers to educational aims that the teacher pursues, as well as the policy documents that are set up by government (Ball & Bass, 2009).