The EdA Center (Adult Education) is a state school that deals with education, instruction and training for adults. It organizes linguistic literacy courses for foreigners (pre-A1, A1 and A2 levels) and advanced level courses (B1 citizenship, B1, B2, C1 and C2); it also offers courses for obtaining a lower secondary school diploma (formerly known as a middle school diploma) and foreign language courses for adults. The EdA Center is also an examination center for the Certification of Knowledge of the Italian Language (CILS) in agreement with the University for Foreigners of Siena.