IB implements an assessment model that combines internal assessment tasks that are graded by SFS teachers and moderated by the IB with exams that are graded by external IB examiners. Students electing to take IB subjects for the IB Diploma or individual courses are expected to complete ALL the required internal assessment tasks, and to sit the specified number of external examinations in May of the second year of the program. Students electing to take the subject for SFS credit only will complete ALL the internal assessment tasks, but will NOT be required to sit the external IB examinations. In lieu of this, they will sit an end of semester final examination or assessment task devised by their class teacher in Year 2 of the course. This will go toward their final SFS result.