The CPIA 1 Siena (Provincial Center for Adult Education) is an institution which belongs to the Italian Ministry of Education, University and Research. It provides courses for adults and young adults who have not completed their compulsory education or who do not have the qualification of the first cycle of education, in the perspective of lifelong learning, in order to acquire knowledge and skills necessary to become active citizens and face the changes of society.

The CPIA is an autonomous educational institution with a specific organizational and educational structure, and is organized into a network of Territorial Services. It is organized to establish close contacts with local authorities, with the world of work and the professions. The CPIA is a training institution accredited by the Tuscany region and it has achieved a certification of quality.

In relation to the specific users, the courses of adult education have been organized in literacy and Italian language courses and first-level courses.

The CPIA provides:

- Courses of literacy and Italian language aimed at obtaining a certification of at least A2 level of the Common European Framework of Reference for Languages;

- Course of first level - first educational period aimed at obtaining a certification of the first cycle of education (former middle secondary school);

- Course of first level - second educational period aimed at obtaining a title certifying the acquisition of basic skills related to compulsory education.

In addition to institutional courses, the CPIA Siena also offers short courses of foreign languages (English and Spanish – levels A1, A2, B1, B2 of CEFR) and ICT at various levels, based on the educational needs expressed by the territory.

The CPIA 1 Siena is also responsible for Prison educationat the District Prison of Siena "S.Spirito" and at the high security prison of San Gimignano "Ranza".