License & Usage

Free for teaching and study.

RealOChem is built to be used and shared. Students and instructors can use everything here for free. RealOChem is a free educational resource; the only thing the license below rules out is commercial use — for example, repackaging this material into a textbook or other product sold for profit.

Content — free for teaching & study

The educational content of RealOChem (practice problems, explanations, hints, instructional text, and answer keys) is licensed under Creative Commons Attribution–NonCommercial 4.0 (CC BY-NC 4.0). In plain terms, you are free to use, copy, and adapt it, as long as you:

• Give credit (BY) — cite “RealOChem” and link back to realochem.study.
• Keep it non-commercial (NC) — no use for commercial advantage.

Full legal code: creativecommons.org/licenses/by-nc/4.0/legalcode

Classroom and individual study use is non-commercial and welcome at no cost. You do not need to ask permission or pay anything to use RealOChem with your students or for your own learning.

Code — all rights reserved

The site’s source code is a separate matter from the content above (Creative Commons licenses aren’t meant for software). The code is © 2026 Dennis Cao, all rights reserved.

For code-reuse inquiries, please get in touch at realochem@gmail.com.

The RealOChem name

“RealOChem” and the RealOChem logo are reserved trademarks. No license above grants the right to use the name or brand — so nothing built on this material may present itself as RealOChem.