The Natural Approach focuses on teaching communicative abilities through comprehensible input. It was developed by Krashen and Terrell in the 1970s as a reaction against previous methods. The key principles are that acquisition, not learning, leads to language proficiency; input must be comprehensible; and meaningful communication should be the focus in the classroom. Teachers provide input through activities like commands, questions, and descriptions while students focus on understanding before speaking. The goal is to help learners progress from understanding to early production to fluency.