BETHLEHEM, Pa. (AP) - A woman who unsuccessfully sued a Pennsylvania university over a C-plus grade has lost her appeal.

Pennsylvania Superior Court ruled against former Lehigh University graduate student Megan Thode, who filed a lawsuit seeking to have the grade raised to a B as well as $1.3 million in damages.

Thode alleged her professor in a 2009 graduate-level therapist internship course retaliated against her over her support of gay marriage. She said the grade prevented her from becoming a licensed therapist.

A Northampton County judge ruled against Thode last year, saying the reason for her C-plus was purely academic and nothing more. The judge also rejected her bid for a new trial.

Superior Court agreed with the decision, saying Thursday that "courts lack the expertise to micromanage ... academic grading."