The definition of instruction and curriculum may take on different meanings based on the purpose or interpretation whether political, social, or educational. Teaching effectively requires the skill of a knowledgeable and experienced educator. Teaching can be convincingly debated as being an art or a science or defined collectively as an art and a science. The different approaches and ways to teach make teaching an art but the necessary knowledge of the material being taught makes teaching a science. An understanding of teaching as an art and a science enables educators to teach more effectively by providing perspective on different teaching approaches.