I believe low GPA is a function of not performing higher on whatever standardized grading system your school was using.

我相信，平均绩点低证明你在学校标准化评分系统中的表现不佳。

youdao

Often the lowest performing students were shuffled off to another low-performing school.

FORBES: Thoughts on ��The Death and Life of the Great American School System�� (Part One)

Give at-risk and low-performing students more money to bring with them to the public school of their choice.

FORBES: NCEE Report Focuses on Teachers as Professionals, New Pay Schemes

Charter schools routinely push out low-performing students, dumping them and their low test-scores back into the traditional public school system.

FORBES: A Modest Proposal: Fire the Students