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Jia-Jun Zhang

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#natural language process... Preprint Sep 2026

SLATE: Are AI-Generated Slides Educationally Effective? A Benchmark for Language Teaching Quality and Learner Knowledge Acquisition

SLATE (Slide-based Learning Assessment for Teaching Effectiveness), the first benchmark that evaluates AI-generated language teaching slides through instructional effectiveness and learner knowledge acquisition, reveals a dissociation between artifact quality and instructional effectiveness.

Jing-Zhuo Wu, Jia-Jun Zhang, Liu Yi et al. · 0 citations

#machine learning Preprint Sep 2026

Gradients Know What Outcomes Don't: Unlocking Reinforcement Learning for LLM Reasoning with Gradient-Aligned Rewards

Gradient-Aligned Reward (GAR), which operates in the policy's own gradient space: truncated backpropagation through the output projection layer extracts a compact gradient vector for each rollout, and cosine similarity with an expert-anchor gradient yields a dense, reasoning-aware reward with less than 9% wall-clock ov...

Le-Qi Zheng, Jin-Bo Su, Fang Niu et al. · 2 citations