From the age of 12 your child is expected to attend secondary education (enseignement secondaire/secundair onderwijs). There are 3 types of free secondary schools: state schools (GO) , charter school (OGO/CECP/CPEONS: subsidised by state) and freely subsidized school (VGO/FELSI/SeGEC: subsidised by non-profit associations which have either a religious or secular approach). Alternatively there are private secondary schools where there is a tuition fee to be paid.
For more information: http://www.enseignement.be/index.php?page=25568
Within the free secondary schools, from the age of 14 your child can choose between 4 programmes (which are not offered at every school)
For more information: http://www.enseignement.be/index.php/index.php?page=24547&navi=45