This proportion is slightly above the average of 9.5% of teachers in TALIS who said they regretted joining the profession (OECD, 2014). This ISCED classification defined tertiary-type A education as ISCED level 5A and tertiary-type B education as ISCED level 5B. According to this classification, tertiary-type A education programmes (ISCED 5A) are largely theory-based, but are not exclusively offered at universities. They aim to provide sufficient qualifications for entry to advanced research programmes and professions with high skill requirements. These programmes have a minimal cumulative theoretical duration of three years, although they typically last four or more years.