Course Catalog
…NGS (no grade submitted), CrE (credit by examination), and Au (audit). Passing grades include A, B, C, D, Cr, CrE, Bg and S. The grades F, NCr, NBg and U indicate that the quality of work was such that, to obtain credit, the student must repeat regular coursework. A plus/minus grading system was adopted beginning fall 2009. It applies to grades of A, B, C…
https://catalog.wichita.edu/graduate/academic-information/academic-definitions-grading-policy/grading-system/