Skill 14: LLM Textbook + Practice Environments（LLM教科书 + 练习环境）

Source: https://x.com/karpathy/status/1885026028428681698 | https://x.com/karpathy/status/1960803117689397543 "Take LLMs to school" | "Environments for RL" posts

Core Principle

LLMs learn like students. Give them textbooks, worked problems, and practice gyms.

Karpathy's insight: the missing ingredient in LLM training isn't more parameters — it's practice environments where agents can try → fail → see feedback → try again. Like a student who reads theory but also needs problem sets.

Apply this to your agents: build environments where they can practice a skill with automatic scoring, not just generate output into the void.

The Three Training Data Types

Every good learning environment needs all three: