The burden of proof of both long and short term mastery of skills or concepts lies with the students.
Mastery is demonstrated by significant achievement on tests, exams, and the question books.
Students having disabilities who choose to disclose the disability must obtain official college recognition of the disability in order for the teacher to make any accommodation. This grade may be replaced by another grade only by the instructor's permission and for extraordinary reasons and if the student has informed the instructor immediately in-person, through a phone conversation, or through a written message. Grades other than the final exam are usually curved by the instructor. This is not the traditional 4.0 grading scheme used at most colleges. The mathematical and general definitions of each grade are listed below .