数学（小学到高中）、英语（三年级到高中）、初中物理的知识图谱：1644 个知识点、2403 条先修边、6723 道题，对齐课标，附自适应前置诊断。
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Build a system, load it until it breaks, and watch why. A system design simulator for learning distributed systems.
Free interactive 3D science lessons for high school · 铜匠实验室 · https://lab.tongjiang.app
你的AI学习搭档：定路线、讲知识、做项目，边学边做，学透一门科目
Turn PDFs, books and papers into interactive learning webpages｜将复杂材料转化为可追溯、可测验、可做笔记的学习网页
An AI skill that turns books into animated, narrated, interactive web experiences
Don't memorize ML. Understand it from first principles including Inference, Cuda, Deep Learning, Data Science and Reinforcement Learning
The ESP32-S3 bench guide as a React app: live pinout, lessons with interactive simulators, a code reader for the esp-labs firmware, and the bench log. In 11 languages.
Claudemy: an open-source alternative to Udemy and Coursera. Give Claude a topic, it researches the web and builds a course of 2-minute audio lessons with cited sources. A free Claude Code skill.
AI 智能错题本：拍照识题、解答、知识点标签、举一反三、组卷打印与掌握度跟踪，可自托管 / AI-powered self-hosted notebook for mistakes
Frametell: turn your ideas and material into vivid explainer videos with an AI director agent. Local-first, any model.
The universe in numbers. Free, open-source calculators for everything countable.
learn stuff with pen + paper + AI
Read-only MCP server that connects Claude, ChatGPT and other AI assistants to Canvas LMS.