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.
Though Dr. Chen and other volunteers did multiple rounds of proofreading, there might still be typos or other issues, please kindly let Dr. Chen know if you find any issues through email (click the button in the bottom right), or the link below, you feedback is much appreciated!
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Exam-Focused Approach – Detailed explanations and summaries of recent USNCO exams, including key concepts, problem-solving strategies, and extensions beyond the test.
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