Third year, also known as S3, is the third year of schooling in Scottish secondary schools, and is roughly equivalent to Year 10 in England and Wales and Year 11 in Northern Ireland. Most pupils are 14 or 15 years old at the end of S3. It is in this year that pupils start their Standard Grade

Standard Grade

Standard Grades are Scotland's educational qualifications for students aged around 14 to 16 years, which are due to be fully replaced in 2014 when Scottish Qualifications Authority's Higher Still system becomes the main qualifications as part of the major shake up of Scotland's education system as...

 courses.

The term can also refer to the third year of a university

University

A university is an institution of higher education and research, which grants academic degrees in a variety of subjects. A university is an organisation that provides both undergraduate education and postgraduate education...

course.