A teaching method is a set of principles and methods used by teachers to enable student learning. These strategies are determined partly by the subject matter to be taught, partly by the relative expertise of the learners, and partly by constraints caused by the learning environment. For a particular teaching method to be appropriate and efficient it has to take into account the learner, the nature of the subject matter, and the type of learning it is supposed to bring about.
The approaches for teaching can be broadly classified into teacher-centered and student-centered, but in practice teachers will often adapt instruction by moving back and forth between these methodologies depending on learner prior knowledge, learner expertise, and the desired learning objectives. In a teacher-centered approach to learning, teachers are the main authority figure in this model. Students are viewed as "empty vessels" whose primary role is to passively receive information (via lectures and direct instruction) with the end goal of testing and assessment. It is the primary role of teachers to pass knowledge and information on to their students. In this model, teaching and assessment are viewed as two separate entities. Student learning is measured through objectively scored tests and assessments. In student-centered learning, while teachers are the authority figure in this model, teachers and students play an equally active role in the learning process. This approach is also called authoritative. The teacher's primary role is to coach and facilitate student learning and overall comprehension of material. Student learning is measured through both formal and informal forms of assessment, including group projects, student portfolios, and class participation. Teaching and assessments are connected; student learning is continuously measured during teacher instruction.
