This monograph is devoted to one of the actual problems of the modern pedagogical science - formation of ecological thinking of students in the conditions of field practice. It specifies a social importance and reveals philosophical, psychological and pedagogical essence of ecological thinking, didactic preconditions and principles of its formation system development, carries out pedagogical designing and develops a mechanism and offers a technique for organizing and conducting field practice as the main condition for students' ecological thinking formation, considering regional features. The functions, content, aims and methods which form teachers' and students' ecological activity in the developed pedagogical The study is intended for teachers and psychologists, specialists working with schoolchildren, as well as ecologists, biologists and geographers, whose activities are related to the organization of excursions and environmental expeditions. It will also be of interest to all those interested in the problems of environmental education.