Helpful hints The first numerical digit in the code shows the Level it is taught at: 1 = First year, 2 = Second year; 3 = Third year. The semester a course is taught in is identified by the last digit in the course code: 0 = Year Long course; 1 = First semester; 2 = Second semester. How to read a course unit code: B I O L 1 0 2 2 1 Subject area – Biological Sciences Level – 1 – A course unit for first year students Semester – 1 – A course unit running in Semester 1 J. Helpful Hints – all ex optom