The natural approach is a language teaching method that aims to replicate how humans naturally acquire their first language. It was developed by Stephen Krashen and Tracy Terrell in 1983. The natural approach believes adults can still acquire a second language through comprehensible input, as in Krashen's input hypothesis. The teacher acts as a guide and uses real-world materials and activities to promote communication over grammatical forms. Students progress from understanding to speaking as they build confidence. While it mirrors the natural first language process, the approach has been criticized as slow and not ensuring correctness.