This document discusses farmer-led extension approaches. It defines farmer-to-farmer extension as training provided by farmers to other farmers, often through farmer promoters and trainers. Farmer field schools are discussed where groups of farmers meet to study topics like conservation agriculture through learning by doing. Criteria for selecting lead farmers and principles of farmer-led extension are outlined, emphasizing that farmers and local institutions should play a key role in selection and evaluation. Farmer field schools are explained as creating awareness, supporting learning, and helping communities solve problems. Their origins in Indonesia in 1989 are also summarized.