Slovenia inherited the academic grading system of the Socialist Federal Republic of Yugoslavia. A five-point grading scale is used in primary and secondary schools:

5: excellent (odlično, best possible grade; usually 90%+) 4: very good (prav dobro, usually 80%+) 3: good (dobro, usually 65%+) 2: sufficient (zadostno, lowest passing grade; usually 50%+) 1: insufficient (nezadostno, lowest possible grade; failing)

Many teachers use minus and plus symbols as grade modifiers. For example, "−5" denotes a grade slightly lower than "excellent", while "+4" denotes a grade slightly higher than "very good". Half-grades such as "4/5" are also used. However, these modifiers are unofficial and do not appear in final grade reports.

In universities, a six-level grading scale is used:

10 – excellent (best possible grade) 9 – very good 8 – very good 7 – good 6 – sufficient (lowest passing grade) 5 or less (failing grades)

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