<-- Finding the Annotated Solutions from the ACS website
About the Annotations
Dr. Chen has been working on the handwritten annotations for USNCO since 2018, which greatly helped students prepare for chemistry olympiad. With the support of USNCO headquarter, Dr. Chen is coordinating a group of passionate and talented volunteers from all over the world to work on the Annotated Solution Project.
Interested in Chemistry Olympiad Classes for 25–26?
Choose the path that fits you best:
- Self-Study + Diagnostic
Study Honors or AP Chemistry on your own, then take Dr. Chen’s diagnostic tests to determine fall placement. Recommended textbooks - Summer Class with Dr. Chen
Take an intensive AP Chemistry+ or Organic Chemistry Class this summer with Dr. Chen to prepare for Level 2, 3, or 4 Olympiad training in the fall. - Start Now – Self-Paced
Prefer to begin right away? Purchase recordings and materials for Level 2, 3, or 4 from 2024-25 and start learning at your own pace!