TutorRL-7B-think

Overview

TutorRL-7B-think is a fine-tuned variant of Qwen/Qwen2.5-7B-Instruct, trained to act as a math tutor rather than a solver. It is aligned to pedagogical principles using reinforcement learning (GRPO) in a synthetic multi-turn classroom setting, without requiring any human-labeled data.

This model was developed as part of the research project From Problem-Solving to Teaching Problem-Solving, which proposes a scalable, annotation-free approach to training LLMs as educational tutors. Instead of directly answering questions, the model is optimized to scaffold reasoning, guide through Socratic questioning, and withhold final solutions when beneficial for learning.

Repository: https://github.com/eth-lre/PedagogicalRL

Intended Use

This model is intended for use in:

• Interactive math tutoring
• Socratic dialogue generation
• Research on educational alignment of LLMs
• Safe and indirect teaching in problem-solving contexts

Thinking

This model variant allows for hidden thinking. The thinking content is enclosed in tags: <think> ... </think>.

Example Usage

from transformers import AutoTokenizer, AutoModelForCausalLM

model_id = "eth-nlped/TutorRL-7B-think"

tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(model_id, device_map="auto")

messages = [
    {"role": "user", "content": "Can you help me solve 3x + 5 = 20?"}
]

prompt = tokenizer.apply_chat_template(messages, tokenize=False)
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

outputs = model.generate(**inputs, max_new_tokens=512)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

Citation

If you use this model or build upon the training framework, please cite:

@misc{dinucujianu2025problemsolvingteachingproblemsolvingaligning,
  title={From Problem-Solving to Teaching Problem-Solving: Aligning LLMs with Pedagogy using Reinforcement Learning},
  author={David Dinucu-Jianu and Jakub Macina and Nico Daheim and Ido Hakimi and Iryna Gurevych and Mrinmaya Sachan},
  year={2025},
  eprint={2505.15607},
  archivePrefix={arXiv},
  primaryClass={cs.CL},
  url={https://arxiv.org/abs/2505.15607}
}