The professional social work: definition, objectives and functions in the political current institutional. The social services in the face of complexity and expectations of today's society. The social service as a discipline: the method and methodology. The methodological approach of the social worker and the helping relationship. Techniques and instruments of Social work . Theoretical reference models and application of tools in the various and changing professional confines: interview - home visit – case's analysis and assessment. Social Work with Groups as social practice. History and evolution of Social Group Work. Theories, ethics, values and techniques and role of the social worker