Active learning is a model of instruction that focuses the responsibility of learning on learners, not on teacher-led instruction, a model also termed student-centered. It is based on the premise that in order to learn, students must do more than just listen: they must read, write, discuss, or be engaged in solving problems. It relates to three learning domains referred to as knowledge, skills and attitudes (KSA) (Bloom, 1956), whereby students must engage in such higher-order thinking tasks as analysis, synthesis, and evaluation. Active learning engages students in two aspects – doing things and thinking about the things they are doing (Bonwell and Eison, 1991). (See Bloom's taxonomy).