chaek-union, a part of the publication committee of the Korea Applied Science Research Association (KASRA), is an open educational organization building free, open-source university-level textbooks and lecture materials. We aim to foster collaboration among educators, researchers, and students to co-create high-quality learning resources in Korean and English.

• Democratize access to university textbooks.
• Co-develop teaching materials in life science, biomedical informatics, genetics, data science, etc.
• Maintain transparency, reproducibility, and open access in all content.
• Build a sustainable community around open education.

Currently, we host the open textbook platform, publishing tools, and 6 active book projects.

(More projects may be added in the future.)

1. Browse the repositories under this organization.
2. Pick a topic or repository of interest.
3. Open an issue or propose a small change (fix typo, clarify text, add reference).
4. Engage in discussion, iterate, and contribute more over time.

We provide a CLI tool to easily bootstrap a new open textbook project. Run the following command:

npx @chaek-org/kit create my-book

You will be prompted for the language (Korean or English), book title, and author. The tool will generate the following standard directory structure:

my-book/
├── book.json            # Book configuration
├── README.md            # Book introduction
├── SUMMARY.md           # Table of contents
├── chapters/
│   └── chapter1.md      # Starter chapter
└── assets/              # Images and static files

1. Issue Creation — Report bugs, request new content, or suggest edits.
2. Fork & PR — Work in small increments. Follow the repository’s style, formatting, and documentation conventions.
3. Documentation & Review — Improve clarity, examples, references, and internal linking.

We welcome contributions from anyone — students, faculty, professionals — as long as they adhere to open license guidelines (e.g., MIT License for tooling).

• Issues and PRs will be triaged by maintainers; major decisions will involve community input.
• Code of Conduct will be adopted to ensure respectful, inclusive collaboration.

We appreciate all contributors. If you’re citing or linking to our work, please mention chaek-union (a part of the publication committee of KASRA) and include the repository URL.
For inquiries, please open an issue or reach out via the email/contact listed in specific repositories.