Secondary schools that offer pre-vocational courses in conjunction with traditional ones have flourished over the past decade in many developing countries. In fact, interest in these “diversified” schools seems to be growing because more and more governments are seeking assistance to establish diversified curricula. Although the World Bank has been investing heavily in these educational programmes, there have not been any studies on the impact of diversified education on economic development. This study was intended to begin a comparison of the advantages accruing to students and graduates of diversified schools and those with more traditional types of formal training. The report describes the research design of the two case studies in Colombia and Tanzania and discusses sampling and survey instruments as well as the results of the case studies of both countries.