Double-Edged Sword or Sharp Tool? Designing and Evaluating Triadic LLM-Teacher Collaboration for K-12 Writing at Scale

Fuente: arXiv
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Main Authors: Wang, Canran, Yang, Yuwen, Wang, Zhen, Ma, Ming, Yu, Ding, Wang, Chentai, Huang, Keman, Du, Xiaoyong
Format: Preprint
Published: 2026
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author Wang, Canran
Yang, Yuwen
Wang, Zhen
Ma, Ming
Yu, Ding
Wang, Chentai
Huang, Keman
Du, Xiaoyong
author_facet Wang, Canran
Yang, Yuwen
Wang, Zhen
Ma, Ming
Yu, Ding
Wang, Chentai
Huang, Keman
Du, Xiaoyong
contents The double-edged sword of integrating Large Language Models (LLMs) requires an effective triadic collaboration mechanism among LLMs, teachers and students, especially for K-12 education. By developing a triadic collaboration system to support K-12 writing learning, a multidimensional evaluation framework grounded in Systemic Functional Linguistics and the suggestion trajectory tracing pipeline, this paper contributes a large-scale empirical dataset involving $57,954$ essays from $10,195$ students across $120$ schools over two years. Our findings confirm the efficacy of this system in improving writing quality through a strategic labor division: the LLM serves as a generative engine to mitigate teacher burnout, and the teacher acts as a pedagogical gatekeeper and bridge to guarantee feedback quality. While both LLM and teacher are critical for skill improvement, we uncover a ceiling effect where excessive linguistic expansion yields diminishing marginal utility. These suggest a dynamically adaptive LLM-teacher collaboration as student proficiency increases.
format Preprint
id arxiv_https___arxiv_org_abs_2605_30200
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Double-Edged Sword or Sharp Tool? Designing and Evaluating Triadic LLM-Teacher Collaboration for K-12 Writing at Scale
Wang, Canran
Yang, Yuwen
Wang, Zhen
Ma, Ming
Yu, Ding
Wang, Chentai
Huang, Keman
Du, Xiaoyong
Artificial Intelligence
The double-edged sword of integrating Large Language Models (LLMs) requires an effective triadic collaboration mechanism among LLMs, teachers and students, especially for K-12 education. By developing a triadic collaboration system to support K-12 writing learning, a multidimensional evaluation framework grounded in Systemic Functional Linguistics and the suggestion trajectory tracing pipeline, this paper contributes a large-scale empirical dataset involving $57,954$ essays from $10,195$ students across $120$ schools over two years. Our findings confirm the efficacy of this system in improving writing quality through a strategic labor division: the LLM serves as a generative engine to mitigate teacher burnout, and the teacher acts as a pedagogical gatekeeper and bridge to guarantee feedback quality. While both LLM and teacher are critical for skill improvement, we uncover a ceiling effect where excessive linguistic expansion yields diminishing marginal utility. These suggest a dynamically adaptive LLM-teacher collaboration as student proficiency increases.
title Double-Edged Sword or Sharp Tool? Designing and Evaluating Triadic LLM-Teacher Collaboration for K-12 Writing at Scale
topic Artificial Intelligence
url https://arxiv.org/abs/2605.30200