Liberal partial-credit prompting reduces question-level grading error for all six tested LLMs, with ChatGPT 5.5 Thinking (LIBERAL) achieving the lowest MAE of 1.87.
Automated feedback in math education: A com- parative analysis of llms for open-ended responses,
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LLMs as Teaching Assistants for Mathematics Exam Grading: Reliability, and Practical Usability
Liberal partial-credit prompting reduces question-level grading error for all six tested LLMs, with ChatGPT 5.5 Thinking (LIBERAL) achieving the lowest MAE of 1.87.