Prepare for Exams
Having the right tools to prepare for Local, National and International Olympiad Exams is the key to success at each level. To prepare for exams, explore our resources below to:
- Review past exams for practice
- Take advantage of our recorded webinars
- Network and collaborate
More Resources
- Get help from our webinars
- Learn how many nominees are allowed from Local Competitions and how National Exam scoring works
- Use Accessible Periodic Table
- Use Exams Reference Page
Review Past Exams
Links to annotated files are included next to the corresponding exam below. Detailed solutions are provided directly in the files for National Exam Parts 2 and 3.
Local Chemistry Olympiad Exams
National Chemistry Olympiad Exams
Detailed solutions are provided directly in the files for National Exam Parts 2 and 3.
To suggest corrections to past solutions, please submit them in the USNCO Preparation Hub.
Solutions are kindly annotated by our volunteers, view all acknowledgments. Sign up as a volunteer to annotate past exams.
USNCO Preparation Hub
Communicate With Fellow Students
This forum is open to anyone interested in USNCO. Share your favorite resources, ask questions of our volunteers, or share comments/suggestions for annotated solution guides in the relevant forums. You only need an ACS ID to login and join the conversation (a member number is not required).
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USNCO Coaching
Get extra help with a USNCO Coach
The USNCO Coaching program helps high school students improve their chemistry skills and become more competitive for the U.S. National Chemistry Olympiad. Students receive extra help during 2-hour sessions for small groups, led by coaches from across the U.S. Coaching sessions are organized over Zoom and coordinated by the American Chemical Society.
Coaching sessions will last for two hours on Fridays every other week in January and February of each year. At each session 30 minute tutorials are be followed by 1 hour and 30 minutes of small group work in breakout room.
