In socio-cultural theories, learning has social nature and the learner has social motives. The effective learning environment is the product of interaction between the specific characteristics of the individual and the existing opportunities for experience that can provide the objective surroundings. Objective of this research was the Discovery Teaching Method applying process (DTM) in a School Project of Environmental Education (SPEE), the analysis of the levels and steps of the educational procedure, in order to be assessed the efficiency of promoting the principles of Environmental Education (EE) and Education for the Sustainable Development (ESD). To answer the main research question, whether in the project, as designed and implemented, applied DTM to promote the principles of EE towards the ESD, had to make a general assessment with content analysis of the project’s archival material triangulating with structured interviews of teachers. The project "Forest, Biodiversity and Quality of Life" which designed to meet the principles of EE and ESD with many and varied activities inside and outside the classroom, with local communities, in the protection and exploitation of natural environments. With the use of DTM, students encouraged to active experiential learning, in collaboration with local communities, authorities, citizens, bodies and experts. Teachers sought experiential approach, opening the school to society, group work in the field and in society, exploited social environments, linked with natural and technical ecosystems, in an interdisciplinary and multidisciplinary approach of topical issues of the school curriculum. The project subject, agro tourism, itself, is directly related to the Economic and Management courses and Administration Business taught in Lyceums. Protection programs and interesting management practices of natural environments and traditional settlements entered under the microscope of the small researchers, maybe future entrepreneurs, making praxis the school theory.