Those in favour of coursework contributing to A Level grades say that this is much fairer than assessment by exam only, as it means that students who are willing to work hard but who perform poorly in exams will have a better chance of doing well. However, this arrangement currently allows far more opportunity for cheating, casting doubt on its fairness. For example, there is a growing market for customised essays available for a fee via the Internet. At the moment the only deterrent is a teacher's vigilance, but while teachers might identify work that seems atypical for individual students, they won't necessarily detect when, for example, a student has had an unacceptable amount of help from family or friends.