D.C. Mun. Regs. tit. 8, r. 8-A615
A student may only retake a course in which he or she received a final grade of "F". If the course is retaken, the initial grade of "F" shall be retained on the student's transcript and the subsequent grade shall be added to the transcript.
Except as provided otherwise in this chapter, the grade which the student receives for the retaken course shall be counted (along with the original grade) in determining the student's cumulative grade point average (CGPA); however, the credit hours for the course shall be counted only once toward the student's total graduation credit hour requirement.
In any of the courses required under § 600.4, the professor may allow a student to retake an examination in the course or resubmit any other evaluative paper or other submission. The exam must be retaken or the resubmission completed within the semester following the end of the course, including the Summer semester.
The course grade following a retaken exam or other resubmission shall be computed as follows:
A failing grade on the retaken exam shall not be included in the student's academic record. The student may elect to retake the course under the provisions of this section.
D.C. Mun. Regs. tit. 8, r. 8-A615