Often, as mentioned in the Australian case-study, students may choose between several options. The problems in implementing such programmes are formidable, in particular with regard to organization and facilities. Specialized workshops are costly and specialized staff not easily available. The concept of centralized workshops has gained ground. In this approach, a given number of specialities, for example, sixteen, are covered in the centralized workshop where students from five to eight different schools go for one to one and a half days per week for a vocational programme. Sometimes, block release is preferred.