In most respects, the criteria for awarding qualifications at honours level and above are the same as in the rest of the UK (see above under England, Wales and Northern Ireland). Postgraduate qualifications are not designated Master of Arts as in the rest of the UK, as this is an undergraduate degree. Postgraduate degrees in arts and humanities subjects are usually designated Master of Letters (M.Litt.) or, in natural and social sciences, Master of Science (M.Sc.). Non-doctoral postgraduate research degrees are usually designated Master of Philosophy (M.Phil.) or Master of Research (M.Res.). The postgraduate teaching qualification is the postgraduate diploma in education (PGDE).