Advanced Higher Grade, roughly equivalent to England's A-Levels, is the non-compulsory Scottish examination for students aged about 17-18.
It is usually required for students who wish to study at universities outside of Scotland. Universities within Scotland tend to take students with only Higher Grade qualifications.
History
Advanced Higher Grade was introduced in 2001 to replace a similar qualification, CSYS (Certificate of Sixth Year Studies), often abbreviated to just SYS. The last CSYS exams were taken by pupils in 2002.
Higher is one of the educational levels of National Course on the Scottish Qualifications Certificate (SQC) offered by the Scottish Qualifications Authority which supereded the old HigherGrade on the Scottish Certificate of Education (SCE).
SCE HigherGrade was the historic terminal exam for the majority of Scottish secondary school students, especially those seeking work in skilled industries or progress onto Higher Education.
Higherlevel National Courses have 4 grades: A, B, C and D. A, B and C all indicate that the candidate has achieved the Higher, with D representing a "first fail" where a candidate just failed to achieve sufficiently to move from Intermediate 2, the next level down.