Book excerpt: The Farmer Field School (FFS) has been one of the most successful approaches developed and promoted by FAO over the past three decades, empowering farmers to become better decision makers in their own farming systems. Initiated by FAO in 1989, and subsequently adopted by many other organizations and institutions, the FFS programs constitute one of the most important “results of the collective action of millions of small-scale farmers” that FAO has supported. FFS is an interactive and participatory learning by doing approach that offers farmers, pastoralists, fisherfolks, foresters and their communities a place where they can learn from each other,share experiences, co-create knowledge and try new ways of doing. Participants enhance their understanding of agro-ecosystems, resulting in production systems that are more resilient and optimize the use of available resources. FFS aims to improve farmers’ livelihoods and recognize their role as innovators and guardians of natural environments. FFS has attained plenty of outstanding achievements in all aspects of agriculture and rural development.