The title is misleading. This isn't an AI tutor so much as a practice quiz platform with an AI autograder.

> constructed-response questions (CRQ) are graded by Claude Sonnet 4.6 against instructor-defined, question-specific rubric criteria

> Crucially, LLMs make it feasible to grade formative CRQ against rubric criteria at scale, a capability that appears pedagogically significant rather than merely convenient.

They specifically call out that the "RAG chat assistant" part of Phosphor (the platform) wasn't used much.

I commend the effort here, but I don't think these results are particularly noteworthy. The conclusion is essentially that people who do practice quizzes will do better on exams.

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fragmede 4 hours ago | parent [-]

> a practice quiz platform with an AI autograder.

What do you think tutoring is?

	▲	mkl 4 hours ago \| parent \| next [-]
		Definitely not just grading. Tutoring is explaining and back and forth discussion to impart knowledge, in context and in response to specific difficulties/confusion the student is having.
	▲	sumeno 3 hours ago \| parent \| prev [-]
		What do you think tutoring is? Because it's not just extra quizzes