Also data on technical-professional programmes include teachers in programmes at the tertiary level (a minor proportion of programmes supervised by CETP). “ Incomplete” means that the teachers attended, or were attending at the time the Census took place, a tertiary programme but had not completed it. As shown in Figure 5.2, in Uruguay, the percentage of certified teachers according to reports from principals of schools attended by 15-year-olds is 57% against an OECD average of 87%. As shown in Table 5.5, analysis of PISA data reveals that the lack of teacher qualifications is more serious in public schools, technical-professional programmes, outside Montevideo and in very unfavourable to medium schools (compared to favourable and very favourable schools).