Education is compulsory from the age of 7 to 13. Pre-school education for children between three and six years of age is optional and in its early stages. There are five levels of education: pre-school, elemental and complementary basic education, general and complementary secondary education, general secondary education, technical and professional teaching, and higher education (university and non-universities). Basic education is under reform, and now forms a single cycle, comprising 6 years of education. Secondary education is widely available and there are two cycles (7th to 9th ''classe'' and 10th to 11th ''classe''). Professional education in public institutions is nonoperational, however private school offerings opened, including the ''Centro de Formação São João Bosco'' (since 2004) and the ''Centro de Formação Luís Inácio Lula da Silva'' (since 2011).