A+ =4.33

A (Excellent)= 4.00

A- = 3.67

B+ = 3.33

B (Good) = 3.00

B- = 2.67

C+ = 2.33

C (Fair) = 2.00

C- = 1.67

D (Poor) = 1.00

F (Failure) = 0.00

P (Pass) 点数なし。GPA計算に使われない。

不合格になった科目を再履修することは1度だけ可能。どちらの等級も成績証明書に記載され、GPAの計算に用いられる。

つまり再履修しても点数は上書きされない。

Students are allowed to repeat a course in which they received a failing grade (i.e. “F”). A failed course may be repeated only once. If repeated, both grades earned in the course will remain on the student’s transcript and both grades will be factored into the student’s GPA.

http://bulletin.columbia.edu/sipa/academic-policies/grading-system-academic-progress/