A very good subject and a very achievable HD. Only compulsary contact hours is a 1 hour lab a week, however you get no participation marks. You do 3 online Multi-Choice quiz's in the lab worth 10% each. There is a group project which is marked quite harshly worth 30%. The final exam allows one page of notes and is quite easy as it is 50/50 short answer and multi choice. Overall a good unit i'd recoomend to do as an elective.